How do you turn a percentage into a decimal?

Divide the percentage by 100 or move the decimal point two spaces to the left. For example, 35% becomes 0.35.

What is percentage difference?

Percentage difference compares two numbers when neither is clearly the 'original' or 'old' value: |A - B| / ((A + B) / 2) × 100%.

How do you calculate percent increase?

Subtract the original value from the new value, divide by the original value, and multiply by 100.

Math

↵ to calculate

Percentage Calculator — 3-in-1 Quick Percent Solutions

Free percentage calculator. Easily solve what is P% of X, X is what percent of Y, and find percentage increase or decrease with instant live calculations.

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How to use this calculator

👉 Fill in the boxes below and your answer appears instantly — no maths needed, we do it all for you! 🎉

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In plain English — what does this do?

🍬 Say you have 100 candies. If you eat 20 of them, you ate 20% (20 out of 100). This tool helps you quickly find out ‘what part of a number is something?’ — super easy!

📌 Direct Answer & Summary

The Percentage Calculator provides an instant 3-in-1 calculation matrix to solve the most common percentage questions: calculating a percentage of a number, finding what percentage one number is of another, and determining the original base value.

1. What is P% of X?

What is % of = 30

2. X is what percent of Y?

is what % of = 75%

3. X is P% of what?

is % of what? = 80

4. Percentage Change (From V₁ to V₂)

Original Value (V₁)

New Value (V₂)

What is Percentage Calculator — 3-in-1 Quick Percent Solutions?

How to use it

1️⃣ Use Box 1 to find: What is P% of X? (e.g. What is 15% of 80?).
2️⃣ Use Box 2 to find: X is what percent of Y? (e.g. 18 is what percent of 90?).
3️⃣ Use Box 3 to find: X is P% of what? (e.g. 24 is 30% of what whole number?).
4️⃣ Use Box 4 to calculate the percentage difference, increase, or decrease between two values.

Formula

P% of X = (P / 100) × X. Percentage = (X / Y) × 100. Whole = X / (P / 100). % Change = ((New - Old) / Old) × 100.

💡 See it in action — a real example

What is 20% of 150? Answer: 30. What percent is 45 of 60? Answer: 75%. From 40 to 50 is a 25% increase.

❓ Common questions

How do you turn a percentage into a decimal?: Divide the percentage by 100 or move the decimal point two spaces to the left. For example, 35% becomes 0.35.
What is percentage difference?: Percentage difference compares two numbers when neither is clearly the 'original' or 'old' value: |A - B| / ((A + B) / 2) × 100%.
How do you calculate percent increase?: Subtract the original value from the new value, divide by the original value, and multiply by 100.