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Numbers Percentage of a number

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Numbers We will often be asked to work out the percentage of an amount without using a calculator

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**We can be clever about this to make it easy for ourselves…**

Numbers We can be clever about this to make it easy for ourselves…

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**We know that percent means out of 100.**

Numbers We know that percent means out of 100. 1% means 1 out of 100 1% of 100 = 1

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Numbers 10% of 100 = 10 So if we can work out 1% of any number, we can multiply this by the percent we need to find

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**Numbers If 1% of 100 is 1 1% of 200 must be 2 1% of 150 must be 1.5**

How are we doing this?

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**We are dividing our amount by 100 1% of 750 = 750 ÷ 100 = 7.5**

Numbers We are dividing our amount by 100 1% of 750 = 750 ÷ 100 = 7.5

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**If we know 1% of 750 is 7.5 then 2% of 750 must be 2 x 7.5 = 15**

Numbers If we know 1% of 750 is 7.5 then 2% of 750 must be 2 x 7.5 = 15

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Numbers What is 5% of 250? 1% of 250 is 2.5 5 x 2.5 is 12.5

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Numbers It is going to take some doing to remember all of this, so lets start by getting used to working out 1% of some numbers

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