Percentage Calculator

The Percentage Calculator tells you what percentage a value is of a total, the remaining percentage, and the remaining value. Enter any two numbers and get instant results.

What is X% of Y?

Percentage (%)

Of what number?

How Percentage Calculations Work

A percentage is a way of expressing a number as a fraction of 100. The word comes from the Latin 'per centum', meaning 'by the hundred'. Percentages are used everywhere — from calculating discounts and tax rates to expressing test scores and investment returns. There are three core percentage problems: finding X% of Y, finding what percentage X is of Y, and finding the percentage change between two values.

Three Core Calculations Explained

1. What is 15% of $85? → 85 × 0.15 = $12.75. 2. 45 is what percent of 180? → (45 ÷ 180) × 100 = 25%. 3. A price went from $40 to $52 — what is the percentage increase? → ((52 − 40) ÷ 40) × 100 = 30%.

Common Percentage Quick Reference

Percentage	Fraction	Decimal	Quick Trick
10%	1/10	0.10	Divide by 10
20%	1/5	0.20	Divide by 5
25%	1/4	0.25	Divide by 4
33.3%	1/3	0.333	Divide by 3
50%	1/2	0.50	Divide by 2
75%	3/4	0.75	Multiply by 0.75

How to Use

1
Enter the value.
2
Enter the total.
3
See the percentage, remaining %, and remaining value instantly.

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Frequently Asked Questions

How do I calculate a percentage?

Divide the value by the total, then multiply by 100. For example, 75 out of 200 = 37.5%.

How do I find what percentage one number is of another?

Use this tool: enter the first number as 'Value' and the second as 'Total'.

Is my data stored?

No. All calculations happen in your browser.

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