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Percentage change uses (new − original) ÷ original × 100. A positive result is an increase and a negative result is a decrease. An original value of zero has no defined percentage change.
Frequently asked questions
Can I use decimals or negative numbers?
Yes. Results are rounded for display. Negative starting values may produce results that need interpretation in your context.
Is this tool free?
Yes. There is no account, payment or software download required to use this tool.