Math
Percentage Change Calculator
Compare initial and final values to compute absolute change and percentage change.
Calculator
Results
- Percentage change25.00%
- Absolute difference30.00
Formula
Percentage change = ((final − initial) ÷ initial) × 100
Use this formula with the live inputs above to test scenarios instantly.
Assumptions
- Initial value must be above zero.
Need a related calculator?
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How this formula works
Percentage change compares relative movement, not just absolute difference. Dividing by the initial value normalizes the change and enables fair comparison across different scales.
This is especially useful in analytics, budgeting, pricing, and performance reporting where growth rates matter more than raw deltas. Always verify the baseline value because it controls interpretation.
References & citation
Use these references when documenting assumptions, and copy the block below when citing this calculator.
- Algebraic and Percentage Reasoning
Khan Academy
Covers the same percentage transformation logic used in this page.
- Distance and Area Formulas
Math Is Fun
Summarizes standard geometry formulas such as area and circumference.