Grade C/B Number questions - % change

Question 1

Increase 40 by 10%

Answer 1

44

Question 2

Increase 35 by 20%

Answer 2

42

Question 3

Increase 60 by 12%

Answer 3

67.2

Question 4

Increase 250 by 15%

Answer 4

287.5

Question 5

Increase 300 by 67%

Answer 5

501

Question 6

Increase 82 by 5%

Answer 6

86.1

Question 7

Increase 520 by 25%

Answer 7

650

Question 8

Increase 82 by 1%

Answer 8

82.82

Question 9

Increase 65 by 72%

Answer 9

111.8

Question 10

Increase £320 by 2%

Answer 10

£326.40

Question 11

Decrease 40 by 10%

Answer 11

36

Question 12

Decrease 90 by 5%

Answer 12

85.5

Question 13

Decrease 600 by 30%

Answer 13

420

Question 14

Decrease £550 by 11%

Answer 14

£489.50

Question 15

Decrease 72 by 8%

Answer 15

66.24

Question 16

Decrease 50 by 50%

Answer 16

25

Question 17

Decrease 85 by 20%

Answer 17

68

Question 18

Decrease 64 by 12%

Answer 18

56.32

Question 19

Decrease $470 by 32%

Answer 19

$319.60

Question 20

Decrease 78 by 1%

Answer 20

77.22

Question 21

After a reduction of 10% a coat now costs £81. What was it originally?

Answer 21

£90

Question 22

After a reduction of 25% a car was on sale for £4125. What did it cost before the reduction?

Answer 22

4125

Question 23

In the sale a jumper costs £21.25. It had been reduced by 15%. What did it cost before the sale?

Answer 23

£25

Question 24

A sausage shrank by 2% when cooked. If the cooked weight was 9.8g, what did it weigh raw?

Answer 24

10g

Question 25

Simon ate 30% of the box of chocolates. IF there were 21 chocolates left, how many were in the full box?

Answer 25

30

Question 26

A price increased by 5% to £52.50. What was it originally?

Answer 26

£50

Question 27

A photo was enlarged by 10% along each side. If the enlarged photo was 24.2cm, how long was the original?

Answer 27

22cm

Question 28

After a 4% pay rise, John earned £33800 per year. What did he earn before the increase?

Answer 28

£32500

Question 29

After an increase of 5% Bills house was worth £266700. What was it worth originally?

Answer 29

£254000

Question 30

Dan increased his pocket money by 20% to £15.60. How much did he used to get?

Answer 30

£12

Question 31

Sarah score 9 out of 15 on a test. What % is this?

Answer 31

60%

Question 32

Frank ate 4 out of 5 sausages. What % of the sausages did he eat?

Answer 32

80%

Question 33

Bob ignores 1 in every 4 emails he gets. What % does he read?

Answer 33

75%

Question 34

James got 56 out of 80 in a test. What % did he get?

Answer 34

70%

Question 35

Harry’s pay went up from $150 per week to $159. What percentage increase is this?

Answer 35

6%