How do you find what percent X is of Y?

Divide X by Y and multiply by 100. Formula: (X ÷ Y) × 100.

How do I reverse a percentage to find the original value?

If the final value is X% of the original, original = final ÷ (X/100). Example: if 221 is 85% of original, original = 221 ÷ 0.85 = 260.

What is the difference between percent and percentage points?

Percentage points are the direct difference between two percentages (10% to 12% is +2 percentage points). Percent change is relative (from 10% to 12% is a 20% increase).

Calculate The Percentages

Q: What is a percentage?

A percentage means “per 100”. For example, 15% means 15 out of 100 (15/100 = 0.15).

Q: How do you calculate X% of Y?

To calculate X% of Y, convert X to a decimal by dividing by 100, then multiply by Y. Formula: (X/100) × Y.

Q: How do you calculate percent change?

Percent change compares a new value to an old value. Formula: ((new − old) ÷ old) × 100. Positive is an increase; negative is a decrease.

Calculate % of a number, what percent, percent change, percentage increase/decrease, percent difference, and reverse percentage. Results update instantly as you type.

Quick Examples

These are examples of calculations

What is 15% of 260? 39 is what percent of 260? Percent change 260 to 299 Percentage increase 80 to 92 Percentage decrease 120 to 90 Percent difference 50 and 65 221 is 85% of what?

4) Percentage increase & percentage decrease

These are the same formula with different wording Google users search them separately, so we include both.

Increase

Old value New value

Result: —

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Decrease

Old value New value

Result: —

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5) Percent difference (between two values)

Percent difference is useful when neither number is “original”. It compares values symmetrically.

Value A

Value B

Result: —

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Common Percentage Questions (Long-Tail Searches)

These are common queries people ask. This page covers them all with the calculators above:

What is 20% of 150?
12 is what percent of 80?
Percent change from 50 to 65
Percentage increase from 80 to 92
Percentage decrease from 120 to 90
How to calculate percent difference between two numbers
If a value is 85% of the original, what was the original?
Difference between percentage points and percent change
How to calculate a 15% discount (subtract 15% from a price)
How to calculate tips and tax using a percentage

Tip: try your own numbers.

FAQ

What is a percentage?

A percentage means “per 100”. For example, 15% = 15/100 = 0.15.

How do you calculate X% of Y?

Use (X/100) × Y. Example: 15% of 260 = (15/100) × 260 = 39.

How do you calculate percent change?

Percent change = ((new − old) ÷ old) × 100. Positive means increase; negative means decrease.

What is percent difference?

Percent difference compares two values without treating one as the “original”: |A − B| ÷ ((A + B)/2) × 100.

How do you reverse a percentage to find the original?

If final is X% of original, original = final ÷ (X/100). Example: 221 ÷ 0.85 = 260.

Percent vs percentage points?

10% → 12% is +2 percentage points. Relative percent change is (2 ÷ 10) × 100 = 20%.

Percentage Calculator

Quick Examples

1) What is X% of Y?

2) What percent is X of Y?

3) Percent change (signed)

4) Percentage increase & percentage decrease

Increase

Decrease

5) Percent difference (between two values)

6) Reverse percentage (find the original)

Common Percentage Questions (Long-Tail Searches)

FAQ