Interest

A percent is one hundredth of a whole:

1\%=\frac{1}{100}

. So

p\%

of a number

a

is found as:

a\cdot\frac{p}{100}

. For example,

15\%

200

200\cdot\frac{15}{100}=30

. Percents describe parts of a whole in a compact way: discounts, growth, poll results, statistics.

p\%=\frac{p}{100}

To find p% of a number: multiply by p/100

Percents are closely tied to fractions and decimal form

Worked examples

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