Percentage Change Calculator
Result:
Welcome to our Percentage Change Calculator. This tool calculates the percentage increase or decrease between two values, helping you understand relative changes in data.
What is Percentage Change?
Percentage change measures the relative change between an old value and a new value, expressed as a percentage of the original value.
Percentage Change Formula
Percentage Change = ((New Value - Old Value) / Old Value) × 100%
Percentage Increase
When: New value > Old value
Result: Positive percentage
Example: $100 to $120 = 20% increase
Formula: ((120-100)/100) × 100 = 20%
Percentage Decrease
When: New value < Old value
Result: Negative percentage (shown as positive)
Example: $100 to $80 = 20% decrease
Formula: ((80-100)/100) × 100 = -20%
Step-by-Step Calculation
Example: Price change from $50 to $65
Step 1: Identify values
Old Value = $50, New Value = $65
Step 2: Calculate absolute change
Change = $65 - $50 = $15
Step 3: Calculate percentage change
Percentage Change = ($15 / $50) × 100% = 30%
Result: 30% increase
Real-World Applications
- Financial analysis: Stock price changes, profit/loss calculations
- Business metrics: Sales growth, market share changes
- Economics: Inflation rates, GDP growth
- Statistics: Data comparison and trend analysis
- Scientific research: Experimental result comparison
Common Examples
Price Increase
$100 → $125
25% increase
Common in retail pricingDiscount
$100 → $75
25% decrease
Sales and promotionsNo Change
$100 → $100
0% change
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