Understanding Percentage Change

Percentage change calculations are commonly used in finance, investing, economics, retail pricing, statistics, and business reporting.

Percentage Increase Formula

((New Value - Original Value) / Original Value) × 100

Percentage Decrease Formula

((Original Value - New Value) / Original Value) × 100

Example

If a stock price rises from $50 to $65:

• Difference = 15
• 15 ÷ 50 = 0.30
• 0.30 × 100 = 30%

The stock increased by 30%.