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Nitro Toolz

Percentage Calculator

Percent of, percent change, increase and decrease in one place.

Percentage Calculator

Generated 10/9/2026

  • What do you want to find?: A percent of a number
  • First value: 15
  • Second value: 240
15% of 240
36

How to use this tool

  1. Choose the question you are asking.
  2. Enter the two values in the order shown in the result label.
  3. Copy the result or share the link.

Formulas

X% of Y = X / 100 x Y. X is what percent of Y = X / Y x 100.

Percent change = (new - old) / |old| x 100.

Frequently asked questions

How do I calculate a discount?

Use the decrease mode: enter the price, then the discount percent.

What is percent change?

The difference between two numbers as a percentage of the starting number.

Why does it say divide by zero?

A percent of zero, or change from zero, is undefined.

Are percent points the same as percent?

No. Going from 4% to 5% is one percentage point and a 25% relative increase.