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Percentage calculator

Calculate a percentage, percentage change or the original value.

About this tool

How do I use this tool?

Calculate a percentage, percentage change or the original value.

What should I check before using the result?

Processing stays in this browser. Your files and entered values are not uploaded.

Worked example

Fifteen percent of 200 is 30; changing from 100 to 120 is a 20% increase.

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Documentation updated