Calculatrice de pourcentage
Résolvez les pourcentages, augmentations et diminutions.
1. What is X% of Y?
What is% of?
40
Formula: (X ÷ 100) × Y — e.g., 20% of 200 = 40
2. X is what percent of Y?
is what % of?
20%
Formula: (X ÷ Y) × 100 — e.g., 30 is 20% of 150
3. X is Y% of what?
is% of what?
125
Formula: X × 100 ÷ Y — e.g., 25 is 20% of 125
4. Percentage increase / decrease
Fromto
+20% increase
Formula: (New − Old) ÷ Old × 100 — e.g., 100 → 120 = +20% increase
How it works
Matches calculator.net percentage calculator: four modes covering all everyday cases — discounts, tips, marks, growth, and change. All math is client-side with exact floating rounding.