Percentage Calculator — Fast & Free

1. What is X% of Y?

Percentage (%)

Of number

Result—

2. X is what % of Y?

Number (X)

Of number (Y)

Result—

3. Percentage Change

From

Change—

4. Add / Subtract a Percentage

Number

Percentage (%)

After adding %—

After subtracting %—

5. Reverse Percentage (find original value)

Final value

Percentage applied (%)

Original (before add %)—

Original (before sub %)—

ℹ️ How to use

Each section is a standalone calculator — just type your numbers and the result updates instantly.

Section 1: Find X% of any number
Section 2: What percent is one number of another
Section 3: Percentage increase or decrease
Section 4: Add or remove a percentage from a price
Section 5: Reverse — find the original value before a % was applied

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❓ Frequently Asked Questions

How do I calculate 20% of a number?

Multiply the number by 0.20 (or 20/100). For example, 20% of 500 = 500 × 0.20 = 100. Or use Section 1 of this calculator: enter 20 in the percentage field and 500 in the number field.

How do I calculate percentage increase?

Percentage increase = ((New Value − Old Value) ÷ Old Value) × 100. For example, if a price goes from 200 to 250, the increase = ((250−200) ÷ 200) × 100 = 25%. Use Section 3 of this tool for instant results.

How do I calculate percentage discount?

Discounted price = Original price × (1 − discount% / 100). For a 30% discount on ₹800: 800 × 0.70 = ₹560. Use Section 4 of this calculator — enter the price and percentage, then read the 'After subtracting %' result.

How do I find the original price after a percentage increase?

If the final price includes a percentage increase, divide the final price by (1 + rate/100). For example, if ₹1,200 includes 20% tax: original = 1200 ÷ 1.20 = ₹1,000. Use Section 5 (Reverse Percentage) for this.

What is percentage vs percentile?

Percentage is a ratio expressed out of 100 (e.g. you scored 75%). Percentile indicates what percentage of the group scored below you (e.g. 90th percentile means you scored higher than 90% of people). They are different concepts.