📊 Percentage Calculator
Calculate any percentage problem easily
How Percentage Calculations Work
Formula
Percentage = (Part ÷ Whole) × 100
- 1Choose your calculation mode: 'X% of Y', '% change from X to Y', or 'X is what % of Y'.
- 2Mode 1 — X% of Y: Multiply Y by X/100. Example: 15% of 200 = 200 × 0.15 = 30.
- 3Mode 2 — % change: ((New − Old) ÷ |Old|) × 100. Example: 50 to 75 = ((75−50) ÷ 50) × 100 = +50%.
- 4Mode 3 — X is what % of Y: (X ÷ Y) × 100. Example: 30 is what % of 200 = (30 ÷ 200) × 100 = 15%.
- 5The full formula and result are displayed step by step.
About Percentage Calculator
Calculate percentages easily. Find what percent of a number is, percentage increase/decrease, and more. Three calculation modes for any percentage problem.
Frequently Asked Questions
How do I calculate a percentage of a number?
Multiply the number by the percentage divided by 100. For example, 20% of 150 = 150 × (20/100) = 30.
How do I calculate percentage increase or decrease?
Subtract the old value from the new value, divide by the old value, and multiply by 100. A positive result is an increase; negative is a decrease.
What is the difference between percentage and percentile?
A percentage is a fraction of 100 (e.g., 25% = 25/100). A percentile indicates the value below which a given percentage of data falls (e.g., 90th percentile means you scored better than 90% of people).