Free Percentage Calculator – Find %, Increase & Decrease
Solve any percentage problem in seconds — find a percentage of a number, calculate percentage change, or discover what percent one value is of another.
What is X% of Y?
X is what % of Y?
Percentage Change
Increase/Decrease by %
Results
What is this tool?
A free Percentage Calculator handles the three most common percentage problems: finding X% of a number, determining what percent A is of B, and calculating percentage increase or decrease between two values. It is useful for discounts, tip calculations, tax amounts, exam scores, financial growth rates, and any scenario involving proportional math — no manual formula needed.
How to use this tool?
1. Select the type of calculation: "X% of Y", "A is what % of B", or "% change from A to B"
2. Enter the required values in the input fields
3. Click "Calculate" to see the result instantly
4. Read the plain-English explanation below the answer
5. Switch between calculation types without clearing your inputs
6. Copy the result for use in reports, assignments, or spreadsheets