Percentage Change Calculator
Calculate the percentage increase or decrease between two numbers.
What Is Percentage Change?
Percentage change measures how much a value has increased or decreased relative to its original amount. It is expressed as a percentage, making it easy to compare changes across different scales.
How to Calculate Percentage Change
The formula is:
Percentage Change = ((New Value − Original Value) ÷ Original Value) × 100
A positive result indicates an increase, while a negative result indicates a decrease.
Percentage Increase vs. Percentage Decrease
A percentage increase occurs when the new value is larger than the original. A percentage decrease occurs when the new value is smaller. The absolute value of the percentage change tells you the magnitude, while the sign tells you the direction.
How to Use This Percentage Change Calculator
- Choose the mode: Percentage Change or Increase / Decrease.
- Enter the required values.
- The result updates automatically as you type.
- Use the Copy button to copy the result, or Reset to restore defaults.
Percentage Change Example
Original Value: 80
New Value: 100
((100 − 80) ÷ 80) × 100 = 25%
Result: 25% increase
Another example:
Original Value: 100
New Value: 75
((75 − 100) ÷ 100) × 100 = −25%
Result: 25% decrease
How to Calculate Percentage Increase
To calculate a percentage increase, subtract the original value from the new value, divide that by the original value, then multiply by 100. If the result is positive, it's an increase.
How to Calculate Percentage Decrease
For a percentage decrease, use the same formula, but if the result is negative, remove the minus sign to express the decrease as a positive percentage.
Frequently Asked Questions
Created by Qurban Ali