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Percentage Calculator

Three common percentage questions in one place: X% of Y, X is what percent of Y, and the percent change from X to Y.

Your numbers

15% of 80

12

Results are estimates for planning. Check important figures with a qualified professional.

Quick answer

The Percentage Calculator shows percent of a number, what percent one number is of another, and percent change. How it works: X% of Y = X ÷ 100 × Y; X as % of Y = X ÷ Y × 100. For example, with question set to What is X% of Y?, x of 15, and y of 80, the 15% of 80 is 12.

How to use the Percentage Calculator

  1. Choose question.
  2. Enter x.
  3. Enter y.
  4. Read 15% of 80 and the breakdown. Use Share to send the exact numbers, or Print to save a PDF.

How it's calculated

  • X% of Y = X ÷ 100 × Y
  • X as % of Y = X ÷ Y × 100
  • % change = (Y − X) ÷ |X| × 100

Worked example

With question of What is X% of Y?, x of 15, and y of 80:

15% of 80: 12

Questions people ask

Percent change vs. percentage points?

Going from 10% to 15% is a 5 percentage point rise, but a 50% percent change.