Percentage Change Calculator
How to Calculate Percentage Change?
The percentage change measures how much a value has increased or decreased compared to its original value. It is calculated using the following formula:
Percentage Change = [(New Value – Old Value) / |Old Value|] × 100
Step-by-Step Calculation:
- Find the Difference: Subtract the old value from the new value.
- Divide by the Absolute Old Value: Divide the difference by the absolute value of the old value.
- Multiply by 100: Convert the ratio into a percentage.
Example 1: Percentage Increase
Old Value: 50
New Value: 75
Percentage Change = [(75 – 50) / 50] × 100
= (25 / 50) × 100
= 50% Increase
Example 2: Percentage Decrease
Old Value: 200
New Value: 150
Percentage Change = [(150 – 200) / 200] × 100
= (-50 / 200) × 100
= -25% Decrease
✅ If the result is positive, it indicates a percentage increase.
✅ If the result is negative, it indicates a percentage decrease.
✅ The old value must not be zero (since division by zero is undefined).