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Percentage calculator
Three common percentage questions in one place.
What is X% of Y?
X is what % of Y?
Change from X to Y
About this tool
Three common percentage questions in one place: what is X% of Y, X is what percent of Y, and what is the percent change from one value to another.
How to use it
- Fill the two boxes in the question you need.
- The answer appears as you type.
Frequently asked questions
- How is percent change calculated?
- (new - old) / old x 100.
- Why does percent change need a non-zero old value?
- Dividing by zero is undefined, so the box stays empty.
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