Math calculator
Percentage Calculator
Find percentages, percentage increase, and percentage decrease quickly online.
Quick answer
How do you calculate a percentage?
To find X% of a number, multiply the number by X and divide by 100 — for example 20% of 150 = 150 × 20 ÷ 100 = 30. To find what percent A is of B, divide A by B and multiply by 100.
x% of y = (x/100) × y • % change = (new − old) / old × 100
⚡ Answer updates as you type · Enter = calculate · Esc = reset
The Percentage Calculator answers what X% of Y is and calculates percentage increase or decrease between two values.
About this Percentage Calculator
Percentages show how one number relates to another out of 100. Use this calculator to find a percent of a number, what percent one number is of another, or the percent change between two values.
What you'll need
- • A starting value
- • A second value or a percentage
How it works
- 1. Pick the type of percentage problem (of, what %, or change).
- 2. Enter the two known values.
- 3. Read the result instantly.
Worked example
20% of 250 is 50. A price that rises from $80 to $100 is a 25% increase.
Related searches
Percentage Calculator FAQ
What is the Percentage Calculator?
The Percentage Calculator is a free online tool that helps you find percentages, percentage increase, and percentage decrease quickly online.
How do I use the Percentage Calculator?
Open the Percentage Calculator, enter the requested values, and review the instant estimate on the page.
Is the Percentage Calculator free?
Yes. The Percentage Calculator is free to use on Fast Online Calculator and does not require an account.
How do you calculate percentage increase?
Subtract the old value from the new value, divide by the old value, and multiply by 100. A jump from 50 to 75 is (75−50)/50 × 100 = 50%.
How do you find a percentage of a number?
Move the percentage's decimal two places left and multiply. 15% of 200 = 0.15 × 200 = 30.
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