Definition:Error/Relative

Definition
Let $x_0$ be an approximation to a (true) value $x$.

The relative error of $x_0$ is defined as:


 * $\delta x := \dfrac {\Delta x} x$

where $\Delta X$ denotes the absolute error:
 * $\Delta x = x_0 - x$

Also see

 * Definition:Absolute Error