How do I calculate percentage increase?

Subtract the original value from the new value, divide the result by the original value, and multiply by 100. For example, if a price went from $80 to $100, the increase is $20 ÷ $80 × 100 = 25%.

What is the difference between percentage increase and percentage difference?

Percentage increase compares a change from an original value to a new one, using the original as the base. Percentage difference compares two values when neither is the 'original' — it divides the absolute difference by the average of both values.

Can I calculate a percentage of a number over 100%?

Yes. Percentages over 100% are valid and common. For example, 150% of 80 is 120. This happens when a value grows beyond its original amount, such as a 200% increase in sales.

Does the percentage calculator work with decimals?

Absolutely. You can enter decimal values for both the base number and the percentage. The tool handles values like 12.5% of 37.5 or an increase from 0.5 to 0.75 without any rounding errors.

Why does the tool show the formula with each result?

Displaying the formula lets you verify the calculation independently and helps you learn the method for future use. It also makes the tool suitable for educational settings where showing your work matters.

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Percentage Calculator

To calculate a percentage of a number, multiply the number by the percentage divided by 100. For percentage increase, subtract the original from the new value, divide by the original, and multiply by 100. Our free online percentage calculator handles all these calculations instantly.

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What is Percentage Calculator?

A percentage calculator is an online tool that computes percentage-of, percentage increase, percentage decrease, and percentage difference values using standard mathematical formulas, delivering instant results without requiring manual computation.

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From figuring out a restaurant tip to measuring quarterly revenue growth, percentage calculations are a daily necessity. This free percentage calculator eliminates the guesswork and formula-hunting by delivering instant, accurate answers for every common percentage problem — with the formula shown so you can trust the result and learn the method at the same time.

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