Percentage Calculator
Handle common percentage math in one place. Find a percent of a number, compare two values by percent, or apply an increase or decrease.
Calculate percentage
Enter values to find percentage.
How it works
What this result means
This calculator handles the three most common percentage problems. The mode you choose depends on which value you already know and which you need to find.
Formula:
Mode 1: X% of Y = Y × (X ÷ 100)
Mode 2 — X is what % of Y:
Result = (X ÷ Y) × 100
Mode 3 — Increase/decrease Y by X%:
Result = Y × (1 + X ÷ 100) or Y × (1 − X ÷ 100)
- Pick the mode that matches your question
- Mode 1: you have a percentage and a number — find the part
- Mode 2: you have two numbers — find what percent one is of the other
- Mode 3: you have a number and a percent change — find the new value
Example
15% of 200 = 30. | 45 is what % of 200? = 22.5%. | 200 increased by 15% = 230.
Use this tool for
- Calculating discounts, tips, or tax amounts
- Checking percentage increases and decreases
- Finding what percent one number is of another
Common questions
- How do I find what percent X is of Y? Divide X by Y and multiply by 100. So (X/Y)-100 gives the percentage. Use the second mode in this calculator.
- What is percentage increase? Increase = ((New ' Old) / Old) - 100. It measures how much a value went up relative to the original.