Percentage Calculator
Calculate percentages, increases, decreases, and differences with this free online percentage calculator.
Calculate X% of Y
Output
How to Use the Percentage Calculator
This calculator offers four different ways to work with percentages. Select the tab that matches your calculation needs, enter the required values, and click "Calculate" to get your result.
Features
- Calculate X% of Y - Find what percentage of a number equals. For example, what is 15% of 200?
- Calculate X is what % of Y - Find what percentage one number is of another. For example, 30 is what percentage of 120?
- Calculate X is Y% of what number - Find the whole when you know a part and its percentage. For example, 45 is 30% of what number?
- Calculate percentage change - Find the percentage increase or decrease from one value to another. For example, what is the percentage change from 80 to 100?
Common Percentage Formulas
To find X% of Y, divide X by 100 and multiply by Y.
To find what percentage X is of Y, divide X by Y and multiply by 100.
To find the whole when you know X is Y%, multiply X by 100 and divide by Y.
To find percentage change, subtract the original value from the new value, divide by the absolute value of the original, and multiply by 100.
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