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The numerator value when the denominator is 100


means "out of 100"


means "times" or "multiply"

out of

means "divide"

Convert percentages to fractions

put the percent over a 100 and remove the % sign.
Simplify if necessary

Convert fractions to percentages

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

Convert percentages to decimals

Divide by 100 and remove the % sign

Convert decimals to percentages

Multiply by 100 and put a % sign on the end

Convert fractions to decimals

divide the numerator by the denominator

Convert decimals to fractions

Use place value!

Finding a percentage of

Remember that % means "out of 100"
So 15% of 34kg = 15/100 x 34 kg

Increasing by a percentage

Find the percentage of the quantity.
Add it on.

Decreasing by a percentage

Find the percentage of the quantity.
Take it off.

Expressing quantities as a percentage

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

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