20% of £180
£36
10% of £150
£15
20% of £455
£91
50% of £96
£48
20% of £170
£34
10% of £1100
£110
25% of £364
£91
5% of £1120
£56
10% of £340
£34
5% of £1600
£80
10% of £560
£56
25% of £60
£15
10% of £480
£48
20% of £400
£80
25% of £144
£36
10% of £1030
£103
50% of £206
£103
50% of £26
£13
5% of £260
£13
5% of £2200
£110
25% of £272
£68
Answers are in pairs. Which is the odd one out?
Topics: Starter  Percentages
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%  This is the percent symbol.
Percent means 'out of 100'.
As 50 is half of 100, then 50% means half. To find 50% of a quantity you need to halve (or divide by two). So 50% of 6 is 3.
As 10 is one tenth of 100, then 10% means 'one tenth of'. To find 10% of a quantity you need to divide it by ten. So 10% of 800 is 80.
As 25 is one quarter of 100, then 25% means 'one quarter of'. To find 25% of a quantity you need to divide it by four. So 25% of 20 is 5.
Another way of finding 25% of a quantity is first finding 50% then dividing the result by 2.
As 33⅓ is one third of 100, then 33⅓% means 'one third of'. To find 33⅓% of a quantity you need to divide it by three. So 33⅓% of 30 is 10.
As 1 is one hundredth of 100, then 1% means 'one hundredth of'. To find 1% of a quantity you need to divide it by 100. So 1% of 800 is 8.
Other percentages can be found by combining some of the techniques mentioned above. Here are some examples:
If you need to use a calculator to check your working. See Calculator Workout skill 3.
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