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Percentage calculator
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15% × 240 = 36
The calculator shows the denominator used by each formula. For percentage change, the starting value is the baseline; a move from 80 to 100 is a 25% increase.
What is the difference between percentage change and percentage points?
Percentage change compares the difference with the original value. Percentage points describe the direct difference between two rates, such as 15% to 20% being a 5 percentage-point increase but a 33.33% relative increase.
How do I calculate a discount or tax?
Use “Increase or decrease Y by X%”. Choose decrease for a discount and increase for tax or a surcharge. The output shows both the change and the final amount.
Does this send my numbers anywhere?
No. All formulas, formatting, and copy actions run in this browser tab.