What does a negative percentage change mean?

A negative result means the value decreased. E.g. 100 to 80 = -20%.

Percentage Change
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((New Value − Original Value) ÷ Original Value) × 100

No. Division by zero is undefined. Enter a non-zero original value.

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Original Value

New Value

ORIG

NEW

- -

Subtract the original from the new value, divide by the original, then multiply by 100. Positive = increase, negative = decrease.

% Change = ((New - Original) / Original) x 100

The original value cannot be zero — division by zero is mathematically undefined.

((New Value - Original Value) / Original Value) x 100. Positive = increase, negative = decrease.

The value decreased. Going from 100 to 80 gives -20%, a 20% decrease.

No — division by zero is undefined. Enter any non-zero original value.