How this calculation works
A negative result means the value decreased. Swapping the inputs reverses the sign and preserves the magnitude.
THE FORMULA
Change = ending value − starting valueA worked example
A drop from 125 to 112 gives −13 units and a change magnitude of 13.
Good to know
Enter both values in the same units.
Reference: OpenStax Prealgebra (opens in a new tab) ↗
Read the result
Measure a change in the original units and distinguish its direction from its magnitude.
The primary result is labeled “Signed change”. Keep the input definitions in view when comparing this result with another method.
Try a related calculation
Enter both values in the same units.
For a related exercise, try the fraction calculator.
A few questions, answered
How can I check the default inputs by hand?
A drop from 125 to 112 gives −13 units and a change magnitude of 13.
Which rule does this calculator apply?
Change = ending value − starting value