Calculate percentages, increase, decrease, and difference instantly.
Enter any two values to calculate the third.
20% of 1000 is 200
Find the absolute difference between two values relative to their average.
The difference is 40% relative to the average of the two values.
Calculate the increase or decrease from one value to another.
Increase
A percentage is a way of expressing a number as a fraction of 100. The word “percent” means “per hundred.”
For example: 25% means 25 out of 100
It can also be written as:
Percentages are widely used in daily life for calculations involving discounts, interest rates, profit, marks, and more.
A percentage calculator is a tool that helps you quickly calculate percentages, including:
It saves time and reduces manual errors.
Example: 20% of 150 = (150 × 20) ÷ 100 = 30
Steps:
Example: Find 30% of 200 → Result: 60
Example: 15% of 80
Solution: (80 × 15) ÷ 100 = 12
Example: 25 is what percent of 200?
Solution: (25 ÷ 200) × 100 = 12.5%
Example: Original price = 100, New price = 120
Increase: ((120 − 100) ÷ 100) × 100 = 20%
Example: Original price = 200, New price = 150
Decrease: ((200 − 150) ÷ 200) × 100 = 25%
Example 1: Basic Percentage
Find 10% of 500
Solution: (500 × 10) ÷ 100 = 50
Example 2: Percentage Increase
Price increases from 80 to 100
Solution: ((100 − 80) ÷ 80) × 100 = 25%
Example 3: Percentage Decrease
Price drops from 150 to 120
Solution: ((150 − 120) ÷ 150) × 100 = 20%
Example 4: Finding Percentage
40 is what percent of 160
Solution: (40 ÷ 160) × 100 = 25%
Example 5: Real-Life Example
A student scores 72 out of 90
Percentage: (72 ÷ 90) × 100 = 80%
| Percentage | Decimal | Fraction |
|---|---|---|
| 10% | 0.10 | 1/10 |
| 25% | 0.25 | 1/4 |
| 50% | 0.50 | 1/2 |
| 75% | 0.75 | 3/4 |
| 100% | 1.00 | 1 |
| Old Value | New Value | Change | Percentage |
|---|---|---|---|
| 100 | 120 | +20 | 20% increase |
| 200 | 150 | -50 | 25% decrease |
| 80 | 100 | +20 | 25% increase |
| 50 | 40 | -10 | 20% decrease |