How do I calculate what percent one number is of another?

To find what percent X is of Y, divide X by Y and multiply by 100: (X ÷ Y) × 100. For example, 25 is what percent of 200? (25 ÷ 200) × 100 = 12.5%. Our calculator does this in the "X is what % of Y?" mode.

How do I calculate a percentage of a number?

To calculate X% of Y, multiply Y by X divided by 100: Y × (X ÷ 100). For example, 20% of 250 = 250 × 0.20 = 50. Use the "What is X% of Y?" mode for this calculation.

How do I calculate percentage increase or decrease?

Percentage change is calculated as ((New Value − Old Value) ÷ Old Value) × 100. A positive result is an increase and a negative result is a decrease. For example, a change from 50 to 65 = ((65−50) ÷ 50) × 100 = 30% increase.

How do I calculate a discount percentage?

To find a discount, calculate the percentage of the original price, then subtract it. For a 25% discount on an $80 item: 25% of $80 = $20, so the sale price is $80 − $20 = $60. Use "What is X% of Y?" mode to find the discount amount.

What is the difference between percentage points and percent change?

Percentage points measure the absolute difference between two percentages, while percent change measures the relative difference. If an interest rate rises from 5% to 7%, that is a 2 percentage-point increase but a 40% relative increase ((7−5) ÷ 5 × 100).

Percentage Calculator

Free percentage calculator — find percentages, percent change, and compute values instantly.

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