Percentage Calculator
Pick the question you're trying to answer, fill in your numbers, and get an instant result.
About this calculator
Percentages show up everywhere — discounts, tips, grades, growth rates, statistics. This tool covers the three questions people search for most often: finding a percentage of a number, figuring out what percent one number represents of another, and calculating percent increase or decrease between two values.
How do I calculate a percentage increase?
Subtract the original value from the new value, divide by the original value, then multiply by 100. A drop from 80 to 100 is a 25% increase.
What's the formula for "X is what % of Y"?
Divide X by Y, then multiply by 100. For example, 30 is 20% of 150.