Percentage Calculator: Percent Of, Percent Change and More

Four everyday percentage calculations in one place: percent of a number, percentage ratio, percent change and price after a markup or discount.

What is% of?–
is what percent of?–
Change fromto–
increased / decreased by%–

A common percentage mistake

Consecutive percentages multiply rather than add: a 10% increase followed by a 20% increase is a 32% total increase (1.10 × 1.20 = 1.32). That’s the same idea behind compound interest.

Frequently Asked Questions

How do I calculate a percentage of a number?

Multiply the number by the percentage and divide by 100. For example, 18% of 250 is 45.

How do I calculate percent change?

(New − Old) ÷ Old × 100. Going from 1,200 to 1,500 is a 25% increase.

This content is for general information only and is not investment advice. Consider your own situation and consult a licensed professional before making financial decisions.