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What the tool does

Answers three everyday questions: what a percent of a number is, what percent one number is of another, and by what percent a number rose or fell.

How to use it

  1. Choose the question.
  2. Type two numbers.
  3. Tap the result to copy it.

Good to know

  • Decimals can be written with a comma or a dot.
  • If it cannot be worked out (division by zero), a dash is shown instead of a result.

Frequently asked questions

How do I find a discount?
Choose "Percent of a number": a 15% discount on a price of 200 gives 30.
How do I work out a price rise?
Choose "Change": from "Was" and "Now" you get the percent of rise or fall.