Everyday calculators
Percentage Calculator
Calculate percentages, percentage increases, and decreases instantly.
Use this percentage calculator for quick math involving discounts, grades, growth, tips, budgets, and everyday comparisons.
Find a percentage of a number
Multiply the number by the percentage as a decimal. For 15% of 480, multiply 480 by 0.15 to get 72.
Percentage increase and decrease
To increase a number by a percentage, add the calculated percentage amount. To decrease it, subtract the amount.
Percentage change is a different question
If you want to know how much a value changed from an old number to a new number, use (new − old) ÷ old × 100.
Frequently asked questions
Can percentages be over 100?Yes. For example, 150% of 20 is 30.
Can I use negative percentages?Yes, but interpret the result carefully based on your situation.