Percentage Calculator

Quickly solve any percentage question: find what percentage a number is, calculate percent of a total, or measure percent increase and decrease.

Inputs

Worked examples

Finding X% of a Total (e.g. 20% of 150)

You want to calculate a 20% portion or fee on a $150 transaction. Result: 30.00.

Formula: (20 ÷ 100) × 150 = 0.20 × 150 = 30.00

Finding What % a Part is of Whole (e.g. 35 out of 140)

You scored 35 correct answers out of 140 total test items. Result: 25.00%.

Formula: (35 ÷ 140) × 100 = 0.25 × 100 = 25.00%

Percentage Increase (e.g. from 50 to 75)

Your monthly active subscribers grew from 50 to 75. Result: +50.00% Increase.

Formula: ((75 - 50) ÷ 50) × 100 = (25 ÷ 50) × 100 = +50.00%

Frequently asked questions

How do you calculate a percentage of a number?

Divide the percentage by 100 to get a decimal, then multiply by the total number. For example, 20% of 150 = 0.20 × 150 = 30.

What is the formula for percentage change?

Percentage Change = ((New Value - Old Value) ÷ |Old Value|) × 100. If the result is positive, it is an increase; if negative, a decrease.

What is the difference between percent change and percentage points?

A percent change measures relative growth or drop, while percentage points measure the direct arithmetic difference between two percentage values (e.g. from 5% to 7% is a 2 percentage point rise, but a 40% relative increase).

Can a percentage increase be greater than 100%?

Yes. A 100% increase means the value has doubled (e.g. from 50 to 100). An increase from 50 to 150 is a 200% increase (tripled), and from 50 to 250 is a 400% increase.

How do you find what percent one number is of another?

Divide the specific part by the total whole and multiply by 100: Formula: (Part ÷ Whole) × 100. For example, 25 out of 200 is (25 ÷ 200) × 100 = 12.5%.