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Free Calculator
Percentage Increase & Decrease Calculator
Enter original and new values to instantly calculate the exact percentage change — positive for increase, negative for decrease.
📈 Calculate % Change
Percentage Change
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Enter both values above
🧠 AI Smart Analysis
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Step-by-Step Solution
1
Enter the original and new values above.
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Real-Life Examples — Click to Try
💼 Salary Raise
From $50,000 → $55,000
+10%
🏷️ Price Drop
Item from $120 → $90
−25%
📊 Revenue Growth
From $1,500 → $1,950
+30%
Frequently Asked Questions
% Change = ((New − Old) ÷ Old) × 100. Positive = increase, negative = decrease. Always use the original value as the denominator.
From 40 to 60 is a 50% increase. Calculation: ((60−40)÷40) × 100 = (20÷40) × 100 = 50%.
Same formula: ((New−Old)÷Old)×100. When new is smaller than old, the result is negative. Example: from 100 to 75 = ((75−100)÷100)×100 = −25%.
Not directly — they compound. 10% then another 10% = (1.10 × 1.10 − 1) × 100 = 21% total, not 20%. This is the concept behind compound growth.
It measures stock appreciation, revenue growth YoY, inflation rates, portfolio returns, salary growth, and earnings per share — providing a normalized way to compare growth across different scales.
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