Percentage Calculator
Calculate percentages easily. Find what percent one number is of another, calculate percentage increase/decrease, and more.
- What %: 25 is what percent of 100? → 25%
- % of: What is 20% of 150? → 30
- Increase: Increase 100 by 15% → 115
- Decrease: Decrease 100 by 25% → 75
About This Tool
The Percentage Calculator simplifies all types of percentage calculations for students, shoppers, and professionals. Whether you need to calculate a tip, figure out a discount, determine grade percentages, or find the percentage change between two numbers, this tool provides instant, accurate results. It handles common scenarios like 'What is 15% of 200?' and 'What percentage is 45 of 180?' as well as percentage increase and decrease calculations.
Frequently Asked Questions
To find what percent X is of Y, divide X by Y and multiply by 100. For example, to find what percent 25 is of 200: (25 ÷ 200) × 100 = 12.5%. Our calculator does this automatically.
Percentage of finds a portion of a number (e.g., 20% of 50 = 10). Percentage increase/decrease compares two values (e.g., going from 50 to 60 is a 20% increase).
Yes! To calculate a discount, use the 'percentage of' function. For example, to find the sale price after a 25% discount on a $80 item, calculate 25% of 80 ($20 off) or 75% of 80 ($60 final price).
Percentage change is calculated as: ((New Value - Old Value) / Old Value) × 100. A positive result means an increase, negative means a decrease. Our calculator handles this automatically.