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Percentage Calculator

Percent of, percent change, and increases. Four answers from two numbers.

Details

Results

A% of B -
A is what % of B -
% change A → B -
A + A% ... B increased by A% -

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How it works

Enter two values. The calculator returns four answers at once: A% of B, A as a percent of B, the percent change from A to B, and B increased by A%.

Percent change: (new − old) ÷ old × 100. A negative result means a decrease.

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FAQs

How do I find a percent of a number?

Multiply the number by the percent divided by 100. The calculator shows A% of B automatically.

How do I calculate percent change?

(new − old) ÷ old × 100; negative means a decrease.

What is ‘A is what % of B’?

A divided by B, multiplied by 100. It shows how large A is as a proportion of B.

How do I add a percentage to a number?

Multiply by (1 + percent / 100). The result is shown automatically.

Does it handle decimals?

Yes - any decimal values work.