Answer
$0.040$
Work Step by Step
We can find the angular magnification from the wrong end as follows:
$M_{wrong\space end}=\frac{f_{objective}}{f_{eyepiece}}$
We plug in the known values to obtain:
$M_{wrong \space end}=\frac{1}{M_{total}}$
We plug in the known values to obtain:
$M_{wrong}=\frac{1}{25}=0.040$
