Percentage Calculator

Three calculation modes: percentage of, what percent, and percent change.

The ANS Tools Percentage Calculator handles three common percentage problems: finding a percentage of a number, finding what percentage one number is of another, and calculating the percentage change between two values.

How to Use the Percentage Calculator

Select the calculation mode from the dropdown
Enter the values in the X and Y fields
Click "Calculate" to see the result instantly

Frequently Asked Questions

Is the percentage calculator free?

Yes, completely free with no signup required.

How do I find what percent X is of Y?

Select "X is what % of Y" mode, enter X as the part and Y as the total, then click Calculate. The result shows the percentage X represents of Y.

How do I calculate percentage increase?

Select "Percentage change" mode, enter the original value and new value. The calculator shows the percentage increase or decrease between the two values.

Can I calculate percentage decrease?

Yes. Use the percentage change mode. If the new value is less than the original, the result will show a negative percentage indicating a decrease.