Percentage Calculator
Calculate percentages easily. Multiple calculation modes for different percentage problems.
Basic Percentage
Percentage Increase
Percentage Decrease
Find Percentage
Reverse Percentage
Calculate Percentage of a Number
What is X% of Y?
What is
%
of
?
Result:
20
20% of 100 = 20
Base (100)
20% = 20
Percentage Increase Calculator
Increase Y by X%
Increase
by
%
Result:
110
100 + (10% of 100) = 110
Increase Amount: 10
Percentage Decrease Calculator
Decrease Y by X%
Decrease
by
%
Result:
90
100 - (10% of 100) = 90
Decrease Amount: 10
Find What Percentage X is of Y
X is what percent of Y?
What percentage is
of
?
Result:
25%
25 ÷ 100 × 100 = 25%
Whole (100)
25 (25%)
Reverse Percentage Calculator
If X is Y% of a number, what is that number?
If
is
%
of a number
The number is:
80
20 ÷ 25 × 100 = 80
Common Examples
What is 20% of 100?
Increase 50 by 20%
Decrease 80 by 15%
30 is what % of 150?
40 is 80% of what?
What is 15% of 200?
Increase 1000 by 7%
Decrease 500 by 30%
Calculation History
About This Tool
The Percentage Calculator helps you solve various percentage problems quickly and accurately. It supports five different calculation modes:
Calculation Modes:
- Basic Percentage: Calculate X% of Y (What is 20% of 100?)
- Percentage Increase: Increase Y by X% (Increase 100 by 10%)
- Percentage Decrease: Decrease Y by X% (Decrease 100 by 10%)
- Find Percentage: Find what percentage X is of Y (25 is what % of 100?)
- Reverse Percentage: Find the original number when X is Y% of it (20 is 25% of what?)
Common Uses:
- Discounts: Calculate sale prices and savings
- Tips: Calculate restaurant tips (15%, 18%, 20%)
- Tax: Calculate sales tax or VAT
- Grades: Calculate test scores and final grades
- Finance: Calculate interest rates and returns
- Statistics: Calculate growth rates and changes