Percentage Calculator
Calculate Percentages with Precision
Professional percentage calculator for all your math needs. Calculate percentage of a number, percentage change, percentage difference, and more. Perfect for students, professionals, and everyday calculations.
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Percentage Calculator
Calculate percentages, tips, discounts, markups, and more
Calculate a percentage of a number (e.g., 25% of 100)
Calculation Result
Result and detailed explanation
Enter valid values to see the calculation result
Understanding Percentages
Learn how percentages work and master common percentage calculations.
What is a Percentage?
A percentage is a way of expressing a number as a fraction of 100. The symbol '%' means 'per hundred' and helps compare proportions easily.
Basic Percentage Formula
Percentage = (Part / Whole) x 100. To find X% of Y: multiply Y by X and divide by 100.
Percentage Increase
Percentage Increase = ((New - Original) / Original) x 100. Used for calculating growth, raises, and price increases.
Percentage Decrease
Percentage Decrease = ((Original - New) / Original) x 100. Perfect for calculating discounts, depreciation, and reductions.
Common Applications
Percentages are used everywhere: discounts, tips, taxes, grades, interest rates, statistics, and data analysis.
Converting Percentages
To convert: Percentage to decimal (divide by 100), decimal to percentage (multiply by 100), fraction to percentage (divide then multiply by 100).
Percentage Quick Reference
Common Conversions
- 10% = 0.1 = 1/10
- 25% = 0.25 = 1/4
- 33.33% = 0.333 = 1/3
- 50% = 0.5 = 1/2
- 75% = 0.75 = 3/4
Mental Math Tips
- 10% = divide by 10
- 5% = half of 10%
- 15% = 10% + 5%
- 20% = 10% x 2
- 25% = divide by 4
Real-World Examples
- Sales tax calculations
- Tip calculations (15-20%)
- Discount savings
- Grade calculations
- Investment returns
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