Math Help - simplify

1. simplify

1-m
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m
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m-1/m

$\frac{\dfrac{1-m}{m}} {m - \dfrac{1}{m}}$
Multiply top and bottom by $m:$
. . $\frac{{\color{blue}m}\left(\dfrac{1-m}{m}\right)} {{\color{blue}m}\left(m - \dfrac{1}{m}\right)} \;=\;\frac{1-m}{m^2-1} \;=\;\frac{-(m-1)}{(m-1)(m+1)} \;=\;\frac{-1}{m+1}$