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Percentage Calculator
Calculate percentages three ways: find what percent of a number is, find what percentage one number is of another, or calculate percentage change between two values.
What is X% of Y?
%
Quick Facts
100% of any number= itself
50% increase then 50% decrease= 75% of original
Tip on a $50 bill (20%)$10.00
Sales tax (avg US)~7.12%
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How to Use This Calculator
- Choose your calculation mode: 'X% of Y', 'X is what % of Y', or 'Percentage change'.
- Enter the required values in the input fields.
- Click Calculate to see the result instantly.
- Review the step-by-step breakdown showing how the calculation was performed.
The Formula
Mode 1: Result = (Percentage / 100) x Number. Mode 2: Percentage = (Part / Whole) x 100. Mode 3: Change = ((New - Old) / Old) x 100.Frequently Asked Questions
'Percentage of' finds a portion of a number (e.g., 20% of 150 = 30). 'Percentage change' measures how much a value increased or decreased relative to its original value (e.g., from 100 to 150 is a 50% increase).