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Percentages

The numerator value when the denominator is 100

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Percent

means "out of 100"

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of

means "times" or "multiply"

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Convert percentages to fractions

put the percent over a 100 and remove the % sign.

Simplify if necessary

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Convert fractions to percentages

Multiply the percentage by 100 and put a % sign on the end

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Convert percentages to decimals

Divide by 100 and remove the % sign

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Convert decimals to percentages

Multiply by 100 and put a % sign on the end

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Convert fractions to decimals

divide the numerator by the denominator

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Convert decimals to fractions

Use place value!

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Finding a percentage of

Remember that % means "out of 100"

So 15% of 34kg = 15/100 x 34 kg

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Increasing by a percentage

Find the percentage of the quantity.

Add it on.

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Decreasing by a percentage

Find the percentage of the quantity.

Take it off.

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Expressing quantities as a percentage

If 3 out of 4 teachers are female, then convert three quarters into a percentage

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