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Percentage Calculator
Quickly calculate percentages, discounts, increases, decreases and ratios
Percentage Calculator
1. What is X% of Y?
What is% of?
25% × 200 =50
2. X is what percent of Y?
is what % of?
50 ÷ 200 × 100 =25%
3. Percentage change from X to Y
Fromto
(100 − 80) ÷ |80| × 100 =+25% increase
4. Increase / decrease a number by X%
%
200 + 15% =230
5. Discount calculator
PriceDiscount%
You save39.998
Final price159.99
Quick Reference
1%= 1/100= 0.01
5%= 1/20= 0.05
10%= 1/10= 0.1
20%= 1/5= 0.2
25%= 1/4= 0.25
33.3%= 1/3= 0.333
50%= 1/2= 0.5
66.7%= 2/3= 0.667
75%= 3/4= 0.75
100%= 1/1= 1.0
Formulas
X% of Y = X × Y ÷ 100
X is what % of Y = (X ÷ Y) × 100
% change = (New − Old) ÷ abs(Old) × 100
Increase by X% = Value × (1 + X ÷ 100)
Decrease by X% = Value × (1 − X ÷ 100)