Percentage Calculator
Easily calculate percentages, percentage changes, and fractional values with our free online tool.
What is
%
of
?
Result
—
Formulas Used
Percentage of Value:
(Percentage / 100) × Value
Find Percentage:
(Part / Total) × 100
Percentage Change:
((New - Old) / Old) × 100
Examples
- What is 20% of 150? Answer: 30
- 50 is what % of 200? Answer: 25%
- Increase from 40 to 50? Answer: +25%
- Decrease from 100 to 80? Answer: -20%
Sponsored
Powered by ManyPI
Turn any website into a type-safe API. Reliable, fast, and easy to integrate.
Learn more
How to Calculate Percentages
Percentages are used to express how large/small one quantity is relative to another. The symbol % means "per 100".
1. Percentage of a Number
To find X% of Y, use the formula: (Percentage / 100) × Value
Example: 20% of 500 = (20/100) × 500 = 0.2 × 500 = 100
2. Find the Percentage
To find what percent X is of Y, use the formula: (Part / Total) × 100
Example: 50 is what % of 200? (50/200) × 100 = 0.25 × 100 = 25%
3. Percentage Change (Increase/Decrease)
To calculate the percentage increase or decrease between two numbers: ((New Value - Old Value) / Old Value) × 100
Example: Old price $50, New price $60. ((60 - 50) / 50) × 100 = (10/50) × 100 = 20% increase.