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11+ · Percentages

EP.M102 Percentage of an Amount: Mental Methods

GL ASSESSMENT GL-11PLUS-MATHS · Calculators not allowed · about 55 minutes

Total Marks

Name: _______________________________ Date: ____ / ____ / ______

Answer ALL questions. Show all your working.

What is 10% of 260?

A) 2.6
B) 26
C) 260
D) 52
E) 13

(Total for Question 1 is 1 mark)

Find 5% of £30.

A) £0.30
B) £3.00
C) £6.00
D) £12.00
E) £1.50

(Total for Question 2 is 1 mark)

Write down 1% of 3,500.

(Total for Question 3 is 1 mark)

State 15% of 200.

(Total for Question 4 is 1 mark)

Work out 15% of £240.

(Total for Question 5 is 2 marks)

Work out 25% of 3,120.

(Total for Question 6 is 2 marks)

Calculate 1% of 450 ml.

(Total for Question 7 is 1 mark)

A hat priced at £48 is reduced by 20%. Work out the sale price.

(Total for Question 8 is 2 marks)

What is 5% of 90?

(Total for Question 9 is 1 mark)

Work out 12% of 250.

(Total for Question 10 is 2 marks)

State 1% of £7,250.

(Total for Question 11 is 1 mark)

A recipe needs 200 g sugar. You use 10% extra. How much sugar do you use in total?

(Total for Question 12 is 2 marks)

Find 1% of 8,250 m.

(Total for Question 13 is 1 mark)

A school has 640 pupils. 5% are left-handed. How many left-handed pupils are there?

(Total for Question 14 is 2 marks)

What is 10% of £3.70?

(Total for Question 15 is 1 mark)

A jumper costs £36. It is increased by 15%. Work out the new price.

(Total for Question 16 is 2 marks)

State 1% of 0.8 kg, giving your answer in grams.

(Total for Question 17 is 1 mark)

A phone costs £240. You pay a 5% deposit. How much is the deposit?

(Total for Question 18 is 2 marks)

What is 10% of 1,350?

(Total for Question 19 is 1 mark)

A 2.75 litre bottle loses 1.5% of its volume through a small leak. Work out how many millilitres of liquid are lost. Give your answer to two decimal places where appropriate.

(Total for Question 20 is 3 marks)

Mark scheme · EP.M102 Percentage of an Amount: Mental Methods

Question 1

B1 correct option B (26) cao
Answer: B) 26 (10% of 260 is 260 ÷ 10 = 26).

Question 2

B1 correct option E (£1.50) cao
Answer: E) £1.50

Question 3

B1 35 cao
Answer: 35

Question 4

B1 30 cao
Answer: 30

Question 5

M1 finding 10% (= £24) and 5% (= £12) or equivalent method
A1 £36 cao
Answer: £36

Question 6

M1 divide by 4 or recognise 25% as one quarter (3,120 / 4 seen)
A1 780 cao
Answer: 780

Question 7

B1 4.5 ml cao
Answer: 4.5 ml

Question 8

M1 find 20% (= £9.60) or equivalent method
A1 £38.40 cao
Answer: £38.40

Question 9

B1 4.5 cao
Answer: 4.5

Question 10

M1 use 10% (=25) and 1% (=2.5) or equivalent method
A1 30 cao
Answer: 30

Question 11

B1 £72.50 cao
Answer: £72.50

Question 12

M1 find 10% of 200 (=20) or equivalent
A1 220 g cao
Answer: 220 g

Question 13

B1 82.5 m cao
Answer: 82.5 m

Question 14

M1 use 5% = 1/20 or 640 / 20 seen
A1 32 cao
Answer: 32

Question 15

B1 £0.37 cao
Answer: £0.37

Question 16

M1 find 10% (=3.60) and 5% (=1.80) or equivalent method
A1 £41.40 cao
Answer: £41.40

Question 17

B1 8 g cao
Answer: 8 g

Question 18

M1 find 5% of 240 (=12) or equivalent
A1 £12.00 cao
Answer: £12.00

Question 19

B1 135 cao
Answer: 135

Question 20

M1 find 1% of 2.75 L (=0.0275 L or 27.5 ml) seen
M1 find 0.5% (half of 1%) or otherwise 0.015 x 2.75 seen (=13.75 ml)
A1 41.25 ml cao
Answer: 41.25 ml

Percentage of an Amount: Mental Methods - Worksheets, Questions and Revision