% Percentage
Calculator
Three modes — instant results as you type.
%
AD · 90
How to calculate percentages
What is X% of Y? Multiply Y by X/100. Example: 15% of 200 = 200 × 0.15 = 30
X is what % of Y? Divide X by Y and multiply by 100. Example: 30 is 15% of 200
% change: ((New - Old) / |Old|) × 100. Negative = decrease, positive = increase.
Percentage calculations come up in everyday life constantly — tips, taxes, discounts, test scores, salary increases, and more. Our percentage calculator handles three common types: finding a percentage of a number, finding what percentage one number is of another, and calculating percentage change between two values. All three modes, instant results.
How It Works
1
What is X% of Y?
Enter the percentage and the total. Example: What is 15% of $85? Answer: $12.75. Perfect for tips, discounts, and tax amounts.
2
X is what % of Y?
Enter the part and the whole. Example: 30 is what % of 150? Answer: 20%. Perfect for test scores and completion rates.
3
Percentage change from X to Y
Enter the original and new value. Example: Price went from $50 to $65 — that's a 30% increase. Negative results indicate a decrease.