 # Percentages: What's 20%?

In this worksheet, students understand how to calculate 20% of a given number. Key stage:  KS 2

Curriculum topic:   Number: Fractions, Decimals and Percentages

Curriculum subtopic:   Recognise Percentages

Difficulty level:   ### QUESTION 1 of 10

To find 10% of a number we must find 1/10 of it.

One way to do this is to divide the number by 10.

To find 20% of a number we first find 10% and then double the result.

Example

Find 20% of 530

First we find 10% which is 530 ÷ 10 = 53

Then we double the result to get 53 x 2 = 106

Work out:

20% of 540

Work out:

20% of 50

Work out:

20% of 90

Work out:

20% of 910

Work out:

20% of 460

Work out:

20% of 120

Work out:

20% of 220

Work out:

20% of 720

Work out:

20% of 1200

Work out:

20% of 3100

• Question 1

Work out:

20% of 540

108
EDDIE SAYS
First we find 10% which is 540 ÷ 10 = 54 Then we double the result to get 54 x 2 = 108
• Question 2

Work out:

20% of 50

10
EDDIE SAYS
First we find 10% which is 50 ÷ 10 = 5 Then we double the result to get 5 x 2 = 10
• Question 3

Work out:

20% of 90

18
EDDIE SAYS
First we find 10% which is 90 ÷ 10 = 9 Then we double the result to get 9 x 2 = 18
• Question 4

Work out:

20% of 910

182
EDDIE SAYS
First we find 10% which is 910 ÷ 10 = 91 Then we double the result to get 91 x 2 = 182
• Question 5

Work out:

20% of 460

92
EDDIE SAYS
First we find 10% which is 460 ÷ 10 = 46 Then we double the result to get 46 x 2 = 92
• Question 6

Work out:

20% of 120

24
EDDIE SAYS
First we find 10% which is 120 ÷ 10 = 12 Then we double the result to get 12 x 2 = 24
• Question 7

Work out:

20% of 220

44
EDDIE SAYS
First we find 10% which is 220 ÷ 10 = 22 Then we double the result to get 22 x 2 = 44
• Question 8

Work out:

20% of 720

144
EDDIE SAYS
First we find 10% which is 720 ÷ 10 = 72 Then we double the result to get 72 x 2 = 144
• Question 9

Work out:

20% of 1200

240
EDDIE SAYS
First we find 10% which is 1200 ÷ 10 = 120 Then we double the result to get 120 x 2 = 240
• Question 10

Work out:

20% of 3100

620
EDDIE SAYS
First we find 10% which is 3100 ÷ 10 = 310 Then we double the result to get 310 x 2 = 620
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