Percentage Change Calculator
Calculate the percentage increase or decrease between two values.
See the exact change and direction.
Percentage Change
Percentage change measures how much a value has increased or decreased relative to its original value.
Percentage Change = ((New Value − Old Value) / Old Value) × 100
If the result is:
- Positive → increase
- Negative → decrease
- Zero → no change
Examples:
- Price went from $50 to $65: ((65 − 50) / 50) × 100 = +30% increase
- Stock dropped from $120 to $96: ((96 − 120) / 120) × 100 = −20% decrease
- Population grew from 10,000 to 12,500: +25% increase
Important note: A 50% increase followed by a 50% decrease does NOT return to the original value. $100 → +50% → $150 → −50% → $75.