Percentage Calculator
Calculate percentages quickly: "What is X% of Y", "X is what % of Y", and percentage change.
What is% of?
How to Use Percentage Calculator
Solve any percentage calculation instantly with three modes: "What is X% of Y" (find a percentage of a number), "X is what percentage of Y" (find the ratio), and "Percentage change from X to Y" (increase or decrease). Clear inputs, instant results, and formulas shown for learning. Used daily by students, shoppers calculating discounts, and professionals working with data.
Frequently Asked Questions
Use "What is X% of Y" — enter the discount percentage and the original price. The result is the discount amount. Subtract it from the original price for the sale price.
Use the "Percentage Change" mode — enter the old value and new value. A positive result means increase, negative means decrease.
For "X% of Y": (X/100) × Y. For "X is what % of Y": (X/Y) × 100. For percentage change: ((New - Old) / Old) × 100.