Math & Numbers
Percentage Calculator
Three modes — pick the one that matches your question.
Calculez des pourcentages, variations et ratios entre nombres
Calculation Modes
% of a Number
What is 15% of 200? → 30
Percentage Change
What % increase is from 80 to 100? → 25%
Reverse Percentage
30 is what % of 120? → 25%
Instant Results
Answers update as you type.
Comment utiliser
- Select the calculation type you need.
- Enter the numbers in the input fields.
- The result appears instantly below.
FAQ
How do I calculate a 20% discount?▾
Use '% of a Number' mode: 20% of the original price gives the discount amount. Subtract from the original for the final price.
How do I find percentage increase?▾
Use 'Percentage Change' mode: enter the old value and new value to get the % change.
Quick Formulas
- X% of Y = (X/100) × Y
- % change = ((New - Old) / Old) × 100
- X is what % of Y = (X/Y) × 100
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