Percentage Calculator
Calculate percentages easily. Find X% of a number, calculate percentage increase/decrease, and solve all types of percentage problems.
What is X% of Y?
What is % of = 30
X is what % of Y?
is what % of = 12.5%
Percentage Increase/Decrease
From to
Change: +20
Percentage: +25%
Increase/Decrease a Number by %
% = 120
Quick Percentage Reference
10%
÷ 10
20%
÷ 5
25%
÷ 4
33.3%
÷ 3
50%
÷ 2
66.7%
× 2/3
75%
× 3/4
100%
× 1
Percentage Formulas
Find X% of Y
Result = (X / 100) × Y
Example: 15% of 200 = 0.15 × 200 = 30
X is what % of Y
% = (X / Y) × 100
Example: 25 is (25/200)×100 = 12.5% of 200
Percentage Change
% = ((New - Old) / Old) × 100
Example: 80→100 = ((100-80)/80)×100 = 25%
Increase by %
Result = X × (1 + %/100)
Example: 100 + 20% = 100 × 1.20 = 120