Percentage Calculator

Calculate percentages, increases, and decreases

Percentages sneak into everyday life — tips, discounts, test scores, price changes. This page covers the three most common questions: what is X% of Y, what's the percentage change between two numbers, and what's the percentage increase from one value to another.

%

Result

50.00

25% of 200

How to Use This Calculator

  1. Pick the tab that matches your question: "X% of Y", "% change", or "% increase".
  2. Enter the two numbers the tab asks for.
  3. Read the result shown below the inputs.

Why Use This Calculator?

  • Figuring out a sale price when a sign says 30% off.
  • Seeing how much a bill or salary went up in percentage terms.
  • Working out a tip or a test score as a percentage.

Real-World Examples

20% of 50

Convert 20% to 0.20 and multiply by 50. The answer is 10.

Price change from $80 to $100

That's a $20 increase on an $80 base, which is a 25% increase.

Score of 18 out of 24

18 ÷ 24 = 0.75, which is 75%.

The basics

A percent is just a fraction out of 100. To find 20% of 50, you're really asking for 20 hundredths of 50: 0.20 × 50 = 10.

Frequently Asked Questions

What's the difference between percent change and percent increase?

Percent change can go up or down, so a drop from 100 to 80 is a -20% change. Percent increase is the same idea framed around growth.

How do I turn a fraction into a percentage?

Divide the top number by the bottom number, then multiply by 100. For example, 3 ÷ 4 = 0.75, which is 75%.

Why is my percentage over 100?

That happens when the new number is larger than the base — it just means something more than doubled or grew beyond the original.

Important Disclaimer

Results are exact for the values you enter. They don't reflect rounding that stores, banks, or schools may apply.

Privacy

Your entries stay in your browser — nothing is sent or stored.

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