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Percentage Increase and Decrease Calculator - Step-by-Step Math Guide
Quickly calculate percentage change between old and new values. Learn the standard mathematical formulas for growth, discounts, and margin shifts.
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Continue to Free Tool / Download →Calculating Percentage Increase and Decrease Accurately
Whether evaluating investment portfolio growth, store discounts, or real estate valuation shifts, calculating percentage variance accurately is fundamental to fiscal clarity.
Standard Mathematical Formulas
Percentage Increase:
Percentage Increase = [ (New Value - Initial Value) / Initial Value ] * 100Percentage Decrease:
Percentage Decrease = [ (Initial Value - New Value) / Initial Value ] * 100| Initial Metric | Updated Metric | Absolute Delta | Percentage Change |
|---|---|---|---|
| $50,000 | $65,000 | +$15,000 | +30.0% Increase |
| 1,200 Visitors | 900 Visitors | -300 Visitors | -25.0% Decrease |
| $4.50 / Litre | $5.15 / Litre | +$0.65 | +14.4% Increase |
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