Percentage Calculator
Calculate percentages with multiple calculation types. Find percentages of numbers, determine what percentage one number is of another, and calculate percentage changes.
Select Calculation Type
Calculate X% of Y
Result
Formula
To find X% of Y:
Convert percentage to decimal, then multiply by the value
Examples
25% of 80:
(25 ÷ 100) × 80 = 0.25 × 80 = 20
About Percentage Calculations
Percentages are a way of expressing numbers as fractions of 100. They are widely used in mathematics, statistics, finance, and everyday life to compare quantities, express changes, and communicate proportions clearly.
This calculator handles three common percentage calculations: finding a percentage of a number, determining what percentage one number is of another, and calculating percentage changes between values.
Understanding these calculations is essential for interpreting data, calculating discounts, analyzing growth rates, and making informed decisions in various contexts.
Common Applications
Shopping & Discounts
Calculate sale prices, tax amounts, and tip percentages.
Finance & Investment
Analyze returns, calculate interest, and assess portfolio performance.
Academic & Testing
Convert scores to percentages and calculate grade improvements.
Business Analytics
Track growth rates, conversion rates, and performance metrics.
Health & Fitness
Calculate body fat percentages and track progress.
Statistics & Research
Express survey results and statistical findings.
Frequently Asked Questions
To calculate a percentage of a number, convert the percentage to a decimal by dividing by 100, then multiply by the number. For example, 25% of 80 = (25 ÷ 100) × 80 = 0.25 × 80 = 20.
Related Math Calculators
Find the right tool for your next calculation