IXL | Solve percent problems

81 is what percent of 90?

Write your answer using a percent sign (%).

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Learn with an example

13 is 20% of what number?

A percent is 1 part out of 100.

Proportions can be used to solve percent problems.

part

whole

percent

100

The part is 13.

The percent is 20%.

Let n represent the whole.

Write a proportion to solve for n.

100

20n

13 · 100

20n

1,300

20n ÷ 20

1,300 ÷ 20

13 is 20% of 65.

You could also find the answer by writing and solving an equation:

13 is 20% of 65.

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