Percentage Calculator
Solve all your percentage-related math problems in one place.
What is X% of Y?
What is
% of
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X is what % of Y?
is what % of
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% Increase/Decrease
From
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X plus/minus Y%
%
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The Power of Percentages
The word "percentage" comes from the Latin "per centum," meaning "by the hundred." It's a way of expressing a number as a fraction of 100. Percentages are essential in finance, statistics, and daily life—from calculating sales tax to understanding stock market changes.
Our multi-functional percentage calculator is designed to cover the four most common scenarios you encounter in school, work, or shopping.
Quick Mental Math Tips
- 10% Trick: To find 10%, just move the decimal one place to the left. (10% of 450 is 45).
- 50% Trick: 50% is always half. (50% of 80 is 40).
- 25% Trick: 25% is half of half. (25% of 100 is 50, then 25).
- The Switch: X% of Y is the same as Y% of X. (8% of 50 is the same as 50% of 8, which is 4).