📊 Percentage Change Calculator
Calculate the percentage increase or decrease between two numbers. Perfect for tracking price changes, salary growth, population changes, or any relative difference calculation.
How to Calculate Percentage Change
The percentage change formula is:
Percentage Change = ((New Value − Original Value) / |Original Value|) × 100
- A positive result means a percentage increase
- A negative result means a percentage decrease
- A result of 0% means no change
Real-World Examples
| Scenario | Original | New | Change |
|---|---|---|---|
| Price increase | $50 | $65 | +30% |
| Salary raise | $4,000 | $4,400 | +10% |
| Population decline | 10,000 | 8,500 | −15% |
Frequently Asked Questions
How do you calculate percentage change?
Percentage change = ((New Value - Old Value) / Old Value) × 100. A positive result is an increase, negative is a decrease.
What is the difference between percentage change and percentage difference?
Percentage change measures growth from an old value to a new value. Percentage difference measures the relative difference between two values with no reference direction.
How do I calculate a price increase percentage?
Subtract the original price from the new price, divide by the original price, then multiply by 100. Example: ($120-$100)/$100 × 100 = 20% increase.