Percentage Increase/Decrease Calculator
Calculate percentage increase or decrease between two numbers with our free online calculator.
Change from
to
= 0%
How to Calculate Percentage Increase or Decrease
Formula
((New Value - Original Value) / Original Value) × 100
To calculate percentage increase or decrease, subtract the original value from the new value, divide by the original value, and multiply by 100. A positive result indicates an increase, while a negative result indicates a decrease.
Step-by-Step Example
Example: Calculate the percentage increase from 80 to 100
- Identify your values:
- Original Value = 80
- New Value = 100
- Subtract original from new value:
100 - 80 = 20 - Divide by original value:
20 ÷ 80 = 0.25 - Multiply by 100:
0.25 × 100 = 25 - Therefore, there is a 25% increase from 80 to 100
Common Use Cases
- Price changes (cost increases or discounts)
- Population growth (demographic changes)
- Sales performance (year-over-year growth)
- Investment returns (profit/loss percentage)
- Salary adjustments (wage increases)
- Market share changes (business growth)
Tips for Accurate Calculations
- Always use the original value as the base for calculations
- Remember that increases exceed 0% and decreases are below 0%
- Be careful with the order of operations
- Check if your result makes logical sense
- Consider rounding to relevant decimal places
Common Percentage Changes Reference
| Change | Calculation | Result |
|---|---|---|
| 100 to 150 | ((150-100)/100) × 100 | +50% increase |
| 200 to 150 | ((150-200)/200) × 100 | -25% decrease |
| 80 to 120 | ((120-80)/80) × 100 | +50% increase |
| 100 to 50 | ((50-100)/100) × 100 | -50% decrease |
| 75 to 100 | ((100-75)/75) × 100 | +33.33% increase |