Percentage Change Calculator
Calculate the percentage change between two values. Determine whether it's an increase or decrease and get detailed step-by-step calculations.
Calculate Percentage Change
Absolute Change
Percentage Change
Formula
Where:
- Positive result = Increase
- Negative result = Decrease
- Original Value ≠ 0
Examples
Increase Example:
From 100 to 125: ((125-100)/100) × 100 = 25% increase
Decrease Example:
From 100 to 75: ((75-100)/100) × 100 = 25% decrease
Common Percentage Changes
Real-World Applications
Business & Finance
Track revenue growth, stock price changes, profit margins, and sales performance.
Academic Performance
Calculate grade improvements, test score changes, and academic progress.
Health & Fitness
Monitor weight changes, body fat percentage, and fitness improvements.
Economics & Statistics
Analyze inflation rates, population changes, and economic indicators.
Tips & Common Mistakes
Order Matters: Always use the original (starting) value as the denominator, not the new value.
Zero Original Value: Cannot calculate percentage change when the original value is zero.
Interpretation: A 100% increase means the value doubled, while a 50% decrease means the value halved.
Maximum Decrease: The maximum possible percentage decrease is 100% (when the new value becomes zero).
Frequently Asked Questions
To calculate percentage change: (1) Find the difference between new and original values, (2) Divide by the original value, (3) Multiply by 100. Formula: ((New Value - Original Value) / Original Value) × 100.
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