失落的一角在线阅读-全国社会保障基金条例

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CHAPTER 1 WHOLE NUMBERS
Number notation and place values up to 10 million
Approximation and estimation
Multiplication and division of numbers up to 4 digits by a 2-digit whole number
Order of operations

1. Round off 69 570 km to the nearest 1 000 km.


2. Round off 7 534 089 to the neatest thousand.


3. A school’s population is 2 904. Round off this number to the nearest thousand.


4. The value of the digit 8 in 980 036 is ___________________________ .

5. What is the sum of the fourth multiple of 8 and the sixth multiple of 4?


6. What is 100 tens less than 1 million?

7. What is 90 hundreds more than 1 million?


8. How many tens are there in 48 200?

,.
9. There are ___________________ hundreds in 1 million.


10. The value of the digit 8 in 487 543 is 8 x _________________________.

11. Write nine million, six hundred and seven thousand and eighty-four in figures.


12. Write five hundred and seven thousand and thirty-three in numerals.

13. Evaluate (Solve) 507 x 28.

14. The product of two numbers is 9 570. If the smaller number is 58, what is the bigger number?


15. The sum of two numbers is 180. The difference between the two numbers is 26. Find the larger
number.



16. Find the value of 85 + 10 x (80 – 60 ) ÷ 4.

17. Find the value of 42 + (139 – 19) ÷ 6 x 2.


18. 162 x 15 = 162 x 10 + (

) What is the missing number in the box?

,.
19. What is the remainder when 2020 is divided by 8?


20. When Sarah opens a book, the sum of the facing page numbers is 273. What is the smaller
page number?

21. Roy and Lin had the same amount of money. When he spent four times as much as Lin, he had
$$22 left while she had $$49 left. How much did Lin have at first?



22. There are ____________ tens in 1 million.

23. The value of 9 in 129 300 is ___________________________.


24. Write 1 489 311 in words: ________________________ _____________________________________________
__________________________________________________ ____________________________________________

CHAPTER 2 MONEY, MEASURES & MENSURATION
Conversion of units of measure involving decimals and fractions
Volume of a cube and a cuboid
Area of a triangle
1. A wooden block measures 10 cm by 8 cm by 2.5 cm. If 4 such wooden blocks are packed
exactly into a rectangular box, what is the capacity of the box?

,.


2. The area of a floor covered in square tiles if 1250 cm
2
. The length of each square tile is 5 cm.
How many square tiles are there covering the floor?



3. A papaya is as heavy as two oranges of equal mass. If the mass of each orange is 160 g , find
the mass of 3 such papayas.
CHAPTER 3 STATISTICS
Line graphs (Reading , interpreting and solving problems)

CHAPTER 4 GEOMETRY
Angles on a straight line, angles at a point, vertically opposite angles
8-point compass
Properties of a parallelogram, rhombus, trapezium, and triangle
Geometrical construction: Draw a square, rectangle, parallelogram, rhombus and triangle from given
dimensions
Tessellation

CHAPTER 5 FRACTIONS
Addition and subtractions of mixed numbers and unlike fractions
Product of fractions

,.
Concept of fraction as division
Division of a proper fraction by a whole number
1. What is of 1h 8 min? _______________________

2. Express day in hours. _______________________


3. There are 18 apples and 12 oranges in a basket. What fraction of the fruits are oranges?
___________________

4. How many hours is of a day? ________________________


5. There are __________ sixths in .

6. Mr. Tan bought some tables. of them were red. The remaining 33 tables were white.
How many tables did he buy altogether? Ans: ___________________________


7. Carl had 8 ½ m of rope. He cut out 3 pieces of ropes measuring 1 ¼ m each. Find the length of
the rope left.
Ans: ____________________________

,.
8. of a number is 36. What is of the number? ________________________


9. of the people at a concert were women and of them were children. If there
were 300 men, how many women were there at the concert? Ans: __________________________


10. 27 kg of rice are shared equally among 7 people. How much rice does each person get? Leave
your answer in its simplest form.

___________ __________________________________________________ __________________(
11. Express 1 390 m as a fraction of 2 km.


__________________ __________________________________________________ ___________( )
)
12. A piece of wire m long is cut into 6 equal pieces. Amy used 3 pieces to tie some
presents. What fraction of the wire did she use altogether?

________ __________________________________________________ _____________________(
13. Find the value of 2 + 1 .


________________ __________________________________________________ _____________( )
)

,.
14. Ben was told to guess a number. He guessed the number to be 8. His guess is ¼ of the actual
number. What is the actual number?



_________________________________________ ______________________________________( )
15. 10 girls received ¼ kg of strawberries each. What is the total weight of strawberries in kg?
(Express your answer in its simplest form)




__________________________ __________________________________________________ ___(

16. Henry bought 60 m of ribbon. He gave away ¾ of the ribbon to Kelly. How many metres of the
ribbon did he give away?




_______________________________ ________________________________________________( )
)
17. Bala gave of his stamps to his brother and of the remainder to his sister. He
had 10 stamps left. How many stamps did he have at first?

,.



_________________ __________________________________________________ ____________( )
18. A rabbit weighs kg. A hamster is of the mass of the rabbit. What is the total mass
of the two animals? (Express your answer as a mixed number in its simplest form.)




______ __________________________________________________ _______________________( )
19. A pair of jeans cost 3 times as much as a skirt. Brenda spent of her money on some
skirts and half of her remaining money on a pair of jeans. How many skirts did she buy?




_______________________________ ________________________________________________(

CHAPTER 6 DECIMALS
Multiplication up to 2 decimal places by a 2-digit whole number
Multiplication and division up to 3 decimal places by tens, hundreds, thousands
1. Zafran paid $$243 for 90 markers. If the price of each marker decreased by $$0.60, how many
more markers could he buy with the money he had?
)

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------------------------------ -------------------------------------------------- -------------------------
--------------------(



2. Round off 9.837 to 1 decimal place. ------------------------------------------ -----------------------
------------(

3. Round off 202.028 to 2 decimal place. ----- -------------------------------------------------- --------
-----------(


4. Round off 29.192 to 2 decimal place. ------------------- ---------------------------------------------
- -----------(

5. 3 ones, 50 hundredths and 2 thousandths is __________________________.


6. 10 tens, 9 hundredths and 7 thousandths is __________________________ .

7. Ray finished 23 of his Math homework. What percentage of his homework did he finish? Give
your answer rounded off to 2 decimal places. < br>----------------------------------------------- -------------------------------------------------- --------
--------------------(




)
)
)
)
)

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8. In every litre of honey water juice, there is 200 ml of honey syrup. The rest of the juice is made
up of water. How much water will there be in 3.5 litres of honey water juice? Leave your answer
in litres.
------------------------------------------------- -------------------------------------------------- ------
--------------------(


CHAPTER 7 AVERAGE, RATE & SPEED
Average
Rate
1. Joyce can write 28 words in 2 minutes. At this rate, how many words can she write in 8 minutes?












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CHAPTER 8 RATIO & PROPORTION
1. (


2. There are 30 buttons in a box. 10 buttons are black and the rest are white. What is the ratio of
the black buttons to the white buttons?


--------------------------- -------------------------------------------------- ----------------------------
-----------------(

3. Lina saves $$53 a month. How much will she save in 2.5 years? -------------------------------------
--( )
)
) : 6 = 28 : 42. Fill in the missing number in the bracket.

,.

4. There are 48 pens and 72 pencils in a container. What is the ratio of the number of pencils to
the number of pens?


- -------------------------------------------------- -------------------------------------------------- ----
-----------------(

5. The marks May and Brenda scored in an Chinese test are in the ratio of 3 : 5. If May has 18
marks less than Brenda, how many marks did May score?



------------------------------------ -------------------------------------------------- -------------------
-----------------(

6. There are 800 men and women at a party. 300 of them are women. What is the ratio of the
number of men to the number of women at the party?



----------------------- -------------------------------------------------- --------------------------------
-------------- ---(


7. The ratio of the number of teachers to pupils at a school is 1 : 9. If there are 108 pupils, how
many teachers are there?
)
)
)

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------------------------------------------------ -------------------------------------------------- -------
-----------------(

8. A piece of wire of 160 cm long was cut into 2 pieces in the ratio of 6 : 2. The shorter piece was
bent to form a square. What is the length of the square?



---------------------- -------------------------------------------------- ---------------------------------
------------- ----(

9. The ratio of Tina’s mass to Joyce’s mass is 4 : 3. If Tina’s mass decreased by 6 kg and Joyce’
s mass is increased by 1 kg, Tina will have the same mass as Joyce. What is Joyce’s original
mass?



---- -------------------------------------------------- -------------------------------------------------- -
-----------------(

10. Andy, Ben and Cavin have a total sum of $$96. Andy and Ben have $$80. What is the ratio of
Cavin’s share to the total sum of money?


)
)
)

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------------------------------ -------------------------------------------------- -------------------------
-----------------(

11. 3 chickens cost $$36 and 8 fishes costs $$72. How much does 6 chickens and 4 fishes cost
altogether?


--------------- -------------------------------------------------- ----------------------------------------
------ -----------(

12. A taxi can carry maximum of 4 passengers. What is the least number of taxis needed to
transport 21 passengers?

-- -------------------------------------------------- -------------------------------------------------- ---
-----------------(

13. If Gary packed 40 apples in each crate, what was the minimum number of crates he needed to
pack 4860 apples?


----------------------- -------------------------------------------------- --------------------------------
-------------- ---(

14. The ratio of Marcus’s age to Francis’s age is 5 : 6. Their total age is 77 years. How old is
Marcus?


)
)
)
)

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-------- -------------------------------------------------- -----------------------------------------------
-----------------(

15. The area of a rectangle is 72 cm
2
. Its length is 18 cm. What is the ratio of the length to its
breadth?


----------------------- -------------------------------------------------- --------------------------------
-------------- ---(

16. The number of chickens and ducks on a farm is in the ratio of 4 : 7. There are 21 more ducks
than chickens. How many chickens and ducks are there altogether?


---- -------------------------------------------------- -------------------------------------------------- -
-----------------(

17. Jill had 150 stamps. She kept half of them and shared the rest between Grace and Ahmad in
the ratio of 2 : 3. How many stamps did Ahmad receive?


- -------------------------------------------------- -------------------------------------------------- ----
-----------------(

18. Charles could buy 8 plums and 5 mangoes with $$8.00. He could buy 16 such plums with the
same amount of money. If he decides to buy mangoes only, how many mangoes can he buy
with $$100?

)
)
)
)

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------ -------------------------------------------------- -------------------------------------------------< br>-----------------(

19. Henry won $$2 400 in a contest. He kept ¼ of it and gave the remainder to his wife, sister and
brother. His wife received 23 of the money, his sister received ¼ of it and his brother received
the rest.
a. How much did his wife receive?
b. What is the ratio of his wife’s share to his brother’s share?
20.



CHAPTER 9 PERCENTAGE
Concept of percentage
Percentage of a quantity
1. Express 1 15 as a percentage.
2. Raymund was given a 20% discount for a meal that cost $$6. How much did he pay for the meal?








)

Percentage and Problem Sums
July 2010
1. Express as a percentage.



2. Express 28% as a fraction in its simplest form.




3. Express ½ % as a fraction in its simplest form.


,.
Date: 18

,.


4. Raymund was given a 20% discount for a meal that cost $$6. How much did he pay for the meal?




5. During a sale, Alicia was given a 15% discount for a book that cost $$12. How much would she
save if she buy the book during the sale?







6. David saved $$9 every day. After a number of days, he used all the money that he had save to
buy a few

storybooks that cost $$21 each.

(a) What was the least number of days that he needed to save in order to buy the storybooks?

(b) How many storybooks did he buy?

,.








7. There were some markers in a box. of the markers were black and the rest were red.

of the black and of the red markers were taken out from the box and there were 111
markers left in

the box. How many markers were there in the box at first?

,.


8. David had some durians. He sold of them in the afternoon and of the remainder in
the evening. There

were 30 fewer durians sold in the evening than in the afternoon.

a. How many durians did he sell in all?

b. If he sold the durians at $$5, how much money did he collect altogether?

9. Danny spent 2 of his money on a bag and
What percentage of his
5 3
money had he left?
10. 140% of a number is 84. Find the number.
,.
1 of the reminder on some snacks.

,.
11. 40% of the erasers in a box are purple. The rest are blue and green erasers in the ratio of 11:4.
There are 48

fewer purple erasers than blue erasers. How many erasers are there altogether?











12. Amy gave 35% of her marbles to Bala. What fraction of her marbles had she left?

,.
13. Devi’s salary and Minah’s salary are in ratio of 4:5. If Devi’s salary is increased by 30%, by
what percentage must

Minah’s salary be increased so that their salaries will be the same?

,.
CHAPTER 1 WHOLE NUMBERS
Number notation and place values up to 10 million
Approximation and estimation
Multiplication and division of numbers up to 4 digits by a 2-digit whole number
Order of operations

1. Round off 69 570 km to the nearest 1 000 km.


2. Round off 7 534 089 to the neatest thousand.


3. A school’s population is 2 904. Round off this number to the nearest thousand.


4. The value of the digit 8 in 980 036 is ___________________________ .

5. What is the sum of the fourth multiple of 8 and the sixth multiple of 4?


6. What is 100 tens less than 1 million?

7. What is 90 hundreds more than 1 million?


8. How many tens are there in 48 200?

,.
9. There are ___________________ hundreds in 1 million.


10. The value of the digit 8 in 487 543 is 8 x _________________________.

11. Write nine million, six hundred and seven thousand and eighty-four in figures.


12. Write five hundred and seven thousand and thirty-three in numerals.

13. Evaluate (Solve) 507 x 28.

14. The product of two numbers is 9 570. If the smaller number is 58, what is the bigger number?


15. The sum of two numbers is 180. The difference between the two numbers is 26. Find the larger
number.



16. Find the value of 85 + 10 x (80 – 60 ) ÷ 4.

17. Find the value of 42 + (139 – 19) ÷ 6 x 2.


18. 162 x 15 = 162 x 10 + (

) What is the missing number in the box?

,.
19. What is the remainder when 2020 is divided by 8?


20. When Sarah opens a book, the sum of the facing page numbers is 273. What is the smaller
page number?

21. Roy and Lin had the same amount of money. When he spent four times as much as Lin, he had
$$22 left while she had $$49 left. How much did Lin have at first?



22. There are ____________ tens in 1 million.

23. The value of 9 in 129 300 is ___________________________.


24. Write 1 489 311 in words: ________________________ _____________________________________________
__________________________________________________ ____________________________________________

CHAPTER 2 MONEY, MEASURES & MENSURATION
Conversion of units of measure involving decimals and fractions
Volume of a cube and a cuboid
Area of a triangle
1. A wooden block measures 10 cm by 8 cm by 2.5 cm. If 4 such wooden blocks are packed
exactly into a rectangular box, what is the capacity of the box?

,.


2. The area of a floor covered in square tiles if 1250 cm
2
. The length of each square tile is 5 cm.
How many square tiles are there covering the floor?



3. A papaya is as heavy as two oranges of equal mass. If the mass of each orange is 160 g , find
the mass of 3 such papayas.
CHAPTER 3 STATISTICS
Line graphs (Reading , interpreting and solving problems)

CHAPTER 4 GEOMETRY
Angles on a straight line, angles at a point, vertically opposite angles
8-point compass
Properties of a parallelogram, rhombus, trapezium, and triangle
Geometrical construction: Draw a square, rectangle, parallelogram, rhombus and triangle from given
dimensions
Tessellation

CHAPTER 5 FRACTIONS
Addition and subtractions of mixed numbers and unlike fractions
Product of fractions

,.
Concept of fraction as division
Division of a proper fraction by a whole number
1. What is of 1h 8 min? _______________________

2. Express day in hours. _______________________


3. There are 18 apples and 12 oranges in a basket. What fraction of the fruits are oranges?
___________________

4. How many hours is of a day? ________________________


5. There are __________ sixths in .

6. Mr. Tan bought some tables. of them were red. The remaining 33 tables were white.
How many tables did he buy altogether? Ans: ___________________________


7. Carl had 8 ½ m of rope. He cut out 3 pieces of ropes measuring 1 ¼ m each. Find the length of
the rope left.
Ans: ____________________________

,.
8. of a number is 36. What is of the number? ________________________


9. of the people at a concert were women and of them were children. If there
were 300 men, how many women were there at the concert? Ans: __________________________


10. 27 kg of rice are shared equally among 7 people. How much rice does each person get? Leave
your answer in its simplest form.

___________ __________________________________________________ __________________(
11. Express 1 390 m as a fraction of 2 km.


__________________ __________________________________________________ ___________( )
)
12. A piece of wire m long is cut into 6 equal pieces. Amy used 3 pieces to tie some
presents. What fraction of the wire did she use altogether?

________ __________________________________________________ _____________________(
13. Find the value of 2 + 1 .


________________ __________________________________________________ _____________( )
)

,.
14. Ben was told to guess a number. He guessed the number to be 8. His guess is ¼ of the actual
number. What is the actual number?



_________________________________________ ______________________________________( )
15. 10 girls received ¼ kg of strawberries each. What is the total weight of strawberries in kg?
(Express your answer in its simplest form)




__________________________ __________________________________________________ ___(

16. Henry bought 60 m of ribbon. He gave away ¾ of the ribbon to Kelly. How many metres of the
ribbon did he give away?




_______________________________ ________________________________________________( )
)
17. Bala gave of his stamps to his brother and of the remainder to his sister. He
had 10 stamps left. How many stamps did he have at first?

,.



_________________ __________________________________________________ ____________( )
18. A rabbit weighs kg. A hamster is of the mass of the rabbit. What is the total mass
of the two animals? (Express your answer as a mixed number in its simplest form.)




______ __________________________________________________ _______________________( )
19. A pair of jeans cost 3 times as much as a skirt. Brenda spent of her money on some
skirts and half of her remaining money on a pair of jeans. How many skirts did she buy?




_______________________________ ________________________________________________(

CHAPTER 6 DECIMALS
Multiplication up to 2 decimal places by a 2-digit whole number
Multiplication and division up to 3 decimal places by tens, hundreds, thousands
1. Zafran paid $$243 for 90 markers. If the price of each marker decreased by $$0.60, how many
more markers could he buy with the money he had?
)

,.
------------------------------ -------------------------------------------------- -------------------------
--------------------(



2. Round off 9.837 to 1 decimal place. ------------------------------------------ -----------------------
------------(

3. Round off 202.028 to 2 decimal place. ----- -------------------------------------------------- --------
-----------(


4. Round off 29.192 to 2 decimal place. ------------------- ---------------------------------------------
- -----------(

5. 3 ones, 50 hundredths and 2 thousandths is __________________________.


6. 10 tens, 9 hundredths and 7 thousandths is __________________________ .

7. Ray finished 23 of his Math homework. What percentage of his homework did he finish? Give
your answer rounded off to 2 decimal places. < br>----------------------------------------------- -------------------------------------------------- --------
--------------------(




)
)
)
)
)

,.

8. In every litre of honey water juice, there is 200 ml of honey syrup. The rest of the juice is made
up of water. How much water will there be in 3.5 litres of honey water juice? Leave your answer
in litres.
------------------------------------------------- -------------------------------------------------- ------
--------------------(


CHAPTER 7 AVERAGE, RATE & SPEED
Average
Rate
1. Joyce can write 28 words in 2 minutes. At this rate, how many words can she write in 8 minutes?












)

,.











CHAPTER 8 RATIO & PROPORTION
1. (


2. There are 30 buttons in a box. 10 buttons are black and the rest are white. What is the ratio of
the black buttons to the white buttons?


--------------------------- -------------------------------------------------- ----------------------------
-----------------(

3. Lina saves $$53 a month. How much will she save in 2.5 years? -------------------------------------
--( )
)
) : 6 = 28 : 42. Fill in the missing number in the bracket.

,.

4. There are 48 pens and 72 pencils in a container. What is the ratio of the number of pencils to
the number of pens?


- -------------------------------------------------- -------------------------------------------------- ----
-----------------(

5. The marks May and Brenda scored in an Chinese test are in the ratio of 3 : 5. If May has 18
marks less than Brenda, how many marks did May score?



------------------------------------ -------------------------------------------------- -------------------
-----------------(

6. There are 800 men and women at a party. 300 of them are women. What is the ratio of the
number of men to the number of women at the party?



----------------------- -------------------------------------------------- --------------------------------
-------------- ---(


7. The ratio of the number of teachers to pupils at a school is 1 : 9. If there are 108 pupils, how
many teachers are there?
)
)
)

,.

------------------------------------------------ -------------------------------------------------- -------
-----------------(

8. A piece of wire of 160 cm long was cut into 2 pieces in the ratio of 6 : 2. The shorter piece was
bent to form a square. What is the length of the square?



---------------------- -------------------------------------------------- ---------------------------------
------------- ----(

9. The ratio of Tina’s mass to Joyce’s mass is 4 : 3. If Tina’s mass decreased by 6 kg and Joyce’
s mass is increased by 1 kg, Tina will have the same mass as Joyce. What is Joyce’s original
mass?



---- -------------------------------------------------- -------------------------------------------------- -
-----------------(

10. Andy, Ben and Cavin have a total sum of $$96. Andy and Ben have $$80. What is the ratio of
Cavin’s share to the total sum of money?


)
)
)

,.
------------------------------ -------------------------------------------------- -------------------------
-----------------(

11. 3 chickens cost $$36 and 8 fishes costs $$72. How much does 6 chickens and 4 fishes cost
altogether?


--------------- -------------------------------------------------- ----------------------------------------
------ -----------(

12. A taxi can carry maximum of 4 passengers. What is the least number of taxis needed to
transport 21 passengers?

-- -------------------------------------------------- -------------------------------------------------- ---
-----------------(

13. If Gary packed 40 apples in each crate, what was the minimum number of crates he needed to
pack 4860 apples?


----------------------- -------------------------------------------------- --------------------------------
-------------- ---(

14. The ratio of Marcus’s age to Francis’s age is 5 : 6. Their total age is 77 years. How old is
Marcus?


)
)
)
)

,.
-------- -------------------------------------------------- -----------------------------------------------
-----------------(

15. The area of a rectangle is 72 cm
2
. Its length is 18 cm. What is the ratio of the length to its
breadth?


----------------------- -------------------------------------------------- --------------------------------
-------------- ---(

16. The number of chickens and ducks on a farm is in the ratio of 4 : 7. There are 21 more ducks
than chickens. How many chickens and ducks are there altogether?


---- -------------------------------------------------- -------------------------------------------------- -
-----------------(

17. Jill had 150 stamps. She kept half of them and shared the rest between Grace and Ahmad in
the ratio of 2 : 3. How many stamps did Ahmad receive?


- -------------------------------------------------- -------------------------------------------------- ----
-----------------(

18. Charles could buy 8 plums and 5 mangoes with $$8.00. He could buy 16 such plums with the
same amount of money. If he decides to buy mangoes only, how many mangoes can he buy
with $$100?

)
)
)
)

,.
------ -------------------------------------------------- -------------------------------------------------< br>-----------------(

19. Henry won $$2 400 in a contest. He kept ¼ of it and gave the remainder to his wife, sister and
brother. His wife received 23 of the money, his sister received ¼ of it and his brother received
the rest.
a. How much did his wife receive?
b. What is the ratio of his wife’s share to his brother’s share?
20.



CHAPTER 9 PERCENTAGE
Concept of percentage
Percentage of a quantity
1. Express 1 15 as a percentage.
2. Raymund was given a 20% discount for a meal that cost $$6. How much did he pay for the meal?








)

Percentage and Problem Sums
July 2010
1. Express as a percentage.



2. Express 28% as a fraction in its simplest form.




3. Express ½ % as a fraction in its simplest form.


,.
Date: 18

,.


4. Raymund was given a 20% discount for a meal that cost $$6. How much did he pay for the meal?




5. During a sale, Alicia was given a 15% discount for a book that cost $$12. How much would she
save if she buy the book during the sale?







6. David saved $$9 every day. After a number of days, he used all the money that he had save to
buy a few

storybooks that cost $$21 each.

(a) What was the least number of days that he needed to save in order to buy the storybooks?

(b) How many storybooks did he buy?

,.








7. There were some markers in a box. of the markers were black and the rest were red.

of the black and of the red markers were taken out from the box and there were 111
markers left in

the box. How many markers were there in the box at first?

,.


8. David had some durians. He sold of them in the afternoon and of the remainder in
the evening. There

were 30 fewer durians sold in the evening than in the afternoon.

a. How many durians did he sell in all?

b. If he sold the durians at $$5, how much money did he collect altogether?

9. Danny spent 2 of his money on a bag and
What percentage of his
5 3
money had he left?
10. 140% of a number is 84. Find the number.
,.
1 of the reminder on some snacks.

,.
11. 40% of the erasers in a box are purple. The rest are blue and green erasers in the ratio of 11:4.
There are 48

fewer purple erasers than blue erasers. How many erasers are there altogether?











12. Amy gave 35% of her marbles to Bala. What fraction of her marbles had she left?

,.
13. Devi’s salary and Minah’s salary are in ratio of 4:5. If Devi’s salary is increased by 30%, by
what percentage must

Minah’s salary be increased so that their salaries will be the same?