# Using a Calculator to Find Percentages of Quantities

In this worksheet, students find percentages of quantities using a calculator.

Key stage:  KS 3

Curriculum topic:   Number

Curriculum subtopic:   Use Calculators/Technology for Accuracy

Difficulty level:

### QUESTION 1 of 10

This worksheet is about finding percentages of quantities using a calculator.

Example

Find 62
 1 2
%   of £732.

Remember that you divide by 100 to find 1% of a number.

On your calculator work out 732 ÷ 100 x 62.5

= 457.5 = £ 457.50

Work out:

54% of 400

Work out:

34% of 420

Work out:

55% of £450

(just write the number)

Work out:

155% of £450

(just write the number)

Work out:

32½% of £300

(just write the number)

Work out:

62½% of £320

(just write the number)

Work out:

62½% of 320 kg

(just write the number)

Work out:

62.3% of 840 km

(just write the number)

Work out:

12.5% of 840 g

(just write the number)

Work out:

125.5% of 650 m

(just write the number)

• Question 1

Work out:

54% of 400

216
• Question 2

Work out:

34% of 420

142.8
• Question 3

Work out:

55% of £450

(just write the number)

247.50
247.5
• Question 4

Work out:

155% of £450

(just write the number)

697.50
697.5
• Question 5

Work out:

32½% of £300

(just write the number)

97.50
97.5
• Question 6

Work out:

62½% of £320

(just write the number)

200
• Question 7

Work out:

62½% of 320 kg

(just write the number)

200
• Question 8

Work out:

62.3% of 840 km

(just write the number)

523.32
• Question 9

Work out:

12.5% of 840 g

(just write the number)

105
• Question 10

Work out:

125.5% of 650 m

(just write the number)

815.75
---- OR ----

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