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Percentage Calculator
Free percentage calculator with four modes: what is X% of Y, X is what % of Y, percentage increase/decrease, and add/subtract a percentage. Instant results with formulas shown.
What is 15% of 200? → 30
Formula: % of
result = (X ÷ 100) × Y
Formula: X of Y%
result = (X ÷ Y) × 100
Formula: % change
result = ((new − old) ÷ |old|) × 100
Formula: Add %
result = X × (1 + Y ÷ 100)
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Frequently Asked Questions
How do I calculate a percentage of a number?
Multiply the number by the percentage divided by 100. For example, 15% of 200 = (15 ÷ 100) × 200 = 30.
How do I calculate percentage increase?
Percentage increase = ((New Value − Old Value) ÷ Old Value) × 100. For example, from 80 to 100 = ((100 − 80) ÷ 80) × 100 = 25% increase.
What is the difference between percentage and percentage points?
Percentage points measure the arithmetic difference between two percentages. For example, going from 10% to 15% is a 5 percentage point increase, but a 50% percentage increase (5 ÷ 10 × 100).
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