Percentage Change Calculator

How to calculate percentage change

Subtract the original value from the new value, then divide by the original value. Multiply by 100 to express the change as a percentage. An increase from 100 to 125 is 25%.

Formula

(new − original) ÷ original × 100

Worked example

Original value

100

New value

125

Applying the formula to these values gives 25 %.

What should I check?

The original value cannot be zero. Negative starting values can give counterintuitive percentages; consider the absolute change alongside the percentage.

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