How do I calculate a percentage of a number?

Multiply the number by the percentage and divide by 100. For example, 15% of 200 = (15 × 200) ÷ 100 = 30.

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

Divide the first number by the second number and multiply by 100. For example, 25 is what percent of 200? (25 ÷ 200) × 100 = 12.5%.

How do I calculate percentage increase or decrease?

Subtract the old value from the new value, divide by the old value, and multiply by 100. A positive result is an increase; a negative result is a decrease.

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PPF 7.1%

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Free Percentage Calculator — Calculate Percentages Instantly

Free Percentage Calculator

Five quick calculators in one — pick the one you need and get the answer instantly.

What is X% of Y?

Percentage (%)

Of number

X is what percent of Y?

Number X

Number Y

Percentage increase or decrease

From (old value)

To (new value)

Add or subtract a percentage

Number

Percentage (%)

Operation

Percentage difference between two numbers

Value A

Value B

How Percentage Calculations Work

X% of Y — multiply X by Y, then divide by 100. Example: 15% of 200 = (15 × 200) ÷ 100 = 30.
X is what % of Y — divide X by Y, then multiply by 100. Example: 25 of 200 = (25 ÷ 200) × 100 = 12.5%.
Increase/decrease — subtract old from new, divide by old, multiply by 100.
Add/subtract % — multiply the number by (1 ± percent ÷ 100).
Percentage difference — |A − B| ÷ ((A + B) ÷ 2) × 100.

Frequently Asked Questions

What's the difference between "percentage change" and "percentage difference"?

Percentage change compares a new value to an old value (e.g., a price going from ₹100 to ₹125 is +25%). Percentage difference compares two values without treating either as the "before" — it uses their average as the base.

Is this percentage calculator free?

Yes — completely free with no signup and no ads interrupting your calculation.

Can I use decimals and negative numbers?

Yes. The calculator accepts decimals (e.g., 12.5%) and negative values for most calculations.

Does it work on mobile?

Yes. Fully responsive and works on Chrome, Edge, Safari, and other modern mobile browsers.

🧮 More Free Calculators