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Percentage Calculator.

Calculate a percent of a number, a percentage change, or a ratio.

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Calculate percentages, ratios and changes

Choose “A% of B”, “A is what % of B” or percentage change from A to B, then enter your numbers to calculate the result.

Example and important limitation

For example, find 20% of 150 or calculate the change from 80 to 100. Percentage change uses the starting number as the baseline, so a zero starting value needs special handling.

What next?

Need to convert units too? Try Unit Converter.