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Numbers

Numbers. Percentage of a number. Numbers. We will often be asked to work out the percentage of an amount without using a calculator. Numbers. We can be clever about this to make it easy for ourselves…. Numbers. We know that percent means out of 100. 1% means 1 out of 100 1% of 100 = 1.

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Numbers

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  1. Numbers Percentage of a number

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

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

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

  5. 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

  6. 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?

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

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

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

  10. 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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