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How to Calculate a Percentage

Percentages express a value as parts per hundred. Common questions include finding a percentage of a number and measuring the percentage change between two values.

Ready to try it?

Find a percentage of a number, percentage change or one value as a percent of another.

Open tool Percentage Calculator

Steps

  1. 1Choose the percentage calculation you need.
  2. 2Enter the value or starting and ending numbers.
  3. 3Read the result and check the formula.
  4. 4Use percentage change for increases or decreases.

Example

To find 15% of 80, calculate 0.15 × 80 = 12.

Keep exploring

Use the browser-based tool to complete this task. Your inputs stay on your device for supported operations. Percentage Calculator

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