Percentage Calculator
Calculate percentages, percentage change, and percentage of a number
Calculation Options
Choose the type of percentage calculation you need
Result
Your percentage calculation result
Enter values and click calculate to see your percentage result
About Percentage Calculations
Common Percentage Formulas
- • Percentage: (Part / Whole) × 100
- • Percentage of: (Percentage / 100) × Number
- • Percentage Change: ((New - Old) / Old) × 100
- • Increase: Original + (Original × Percentage / 100)
- • Decrease: Original - (Original × Percentage / 100)
Use Cases
- • Calculate discounts and sales tax
- • Determine grade percentages
- • Analyze business growth rates
- • Calculate tip amounts
- • Track investment returns
Frequently Asked Questions
What is a percentage?▾
A percentage is a number or ratio expressed as a fraction of 100. The symbol "%" means "per hundred," so 25% means 25 out of every 100.
How do you calculate the percentage of a number?▾
Multiply the number by the percentage and divide by 100. For example, 20% of 250 = (20 × 250) / 100 = 50.
How do you find percentage increase?▾
Subtract the original value from the new value, divide by the original value, then multiply by 100. For example, going from 50 to 75 is ((75 − 50) / 50) × 100 = 50% increase.
How do you find percentage decrease?▾
Subtract the new value from the original, divide by the original, then multiply by 100. A drop from 80 to 60 is ((80 − 60) / 80) × 100 = 25% decrease.