Percentage Change Calculator
Calculate the percentage change, increase, or decrease between two values. Essential for finance, statistics, and everyday comparisons.
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Percentage Change
% Change
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Absolute Difference
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Direction
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Formula: % Change = ((V₂ − V₁) ÷ V₁) × 100
Comprehensive Guide & Practice
Master the mathematical principles, formulas, and step-by-step methods with worked examples and FAQs.
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1. How to Calculate Percentage Change
Percentage change measures how much a value has increased or decreased relative to the original value. It is one of the most universally useful formulas in mathematics, statistics, finance, and science.
Formula: % Change = ((New Value − Original Value) ÷ Original Value) × 100
If the result is positive → it's an increase. If negative → it's a decrease.
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2. Examples
- Price from $50 to $75: ((75−50)/50) × 100 = +50% increase
- Temperature from 80°F to 64°F: ((64−80)/80) × 100 = −20% decrease
- Exam score from 65 to 82: ((82−65)/65) × 100 = +26.15% increase
See also: Percentage Calculator | Discount Calculator | Percentage Increase & Decrease Guide