How do I find X percent of a number?

To find X percent of Y, multiply X by Y and then divide by 100. For example, 20% of 50 is (20 * 50) / 100 = 10.

How do I calculate percentage increase?

Subtract the original number from the new number to find the difference. Divide that difference by the original number, then multiply by 100.

How do I calculate percentage change between two numbers?

The formula for percentage change is: ((New Value - Old Value) / |Old Value|) * 100. A positive result is an increase, and a negative result is a decrease.

What is the difference between percentage change and percentage points?

Percentage change is the relative change between two values. Percentage points refer to the absolute difference between two percentages. For example, moving from 40% to 50% is a 10 percentage point increase, but a 25% percentage change.

How do I find X percent of a number?

To find X percent of Y, multiply X by Y and then divide by 100. For example, 20% of 50 is (20 * 50) / 100 = 10.

How do I calculate percentage increase?

Subtract the original number from the new number to find the difference. Divide that difference by the original number, then multiply by 100.

How do I calculate percentage change between two numbers?

The formula for percentage change is: ((New Value - Old Value) / |Old Value|) * 100. A positive result is an increase, and a negative result is a decrease.

What is the difference between percentage change and percentage points?

Percentage change is the relative change between two values. Percentage points refer to the absolute difference between two percentages. For example, moving from 40% to 50% is a 10 percentage point increase, but a 25% percentage change.

Percentage Calculator

Calculate percentages instantly: X% of Y, percentage change, increase and decrease, with the formula shown.

Select Calculation Type

What is X% of Y?

Percentage (X %)

Value (Y)

How to Use

1
Select calculation type
Choose whether you want to find a percentage of a number, a percentage change, or what percent X is of Y.
2
Enter the numbers
Type the two values required for your chosen calculation.
3
View the result
The calculation updates instantly as you type.
4
Review the formula
Look below the result to see the exact mathematical formula used to reach the answer.

Math doesn't have to be hard. Our free online percentage calculator provides instant answers to all common percentage problems, complete with the step-by-step formulas used to reach them.

How to Calculate Percentage

Whether you are figuring out a tip at a restaurant, calculating a retail discount, or analyzing data for work, knowing exactly how to calculate percentage values is essential. This tool handles everything from basic "what is X percent of Y" queries to complex percentage difference calculator problems.

Common Calculations

Percent Calculator: Find a specific portion of a total. (e.g., What is 15% of $80?)
Percentage Increase Calculator: Easily determine profit growth or price markups. (e.g., A price went from $40 to $50, what is the increase?)
Percentage Decrease Calculator: Calculate discounts and sales drops. (e.g., An item was $100 and is now $75.)
Percentage Change Calculator: Find the relative percentage change between two numbers, regardless of whether it went up or down.

Why We Show the Formula

We believe in transparency. By showing the exact formula below every result, you can verify the math and learn how to perform the calculation yourself in the future.