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Percentage Difference
Calculate the absolute and percentage change between two values, with clear formulas and results for pricing, analytics, experiments, or homework quickly.
How to use this tool
- Enter original and new values to compare.
- Choose percent-change or symmetric-difference formula mode.
- Review computed change metrics and copy or download the summary.
Where it helps
- Track metric deltas across reporting periods.
- Compare expected versus actual outcomes in experiments.
- Explain trend changes in finance and product dashboards.
Interpretation notes
- Positive values indicate increase, negative values indicate decrease.
- Percent change from original is undefined when baseline is zero.
- Symmetric mode offers a balanced comparison when directionless distance matters.
FAQ
- Why can percent change be undefined?
- When original value is zero, dividing change by baseline is undefined, so symmetric mode is often the better option.
- Can I use negative input values?
- Yes. Negative values are supported and can model balances, offsets, or below-zero measurements.
- What does export include?
- Exports include input values and computed change metrics in a plain text summary.
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