[tex]1\frac{1}{6}h=70min\\\\
\frac{7}{8}\ of\ wall\ in\ 70\ min\\
x\ wall\ in\ 1\ min\\\\
Proportion:\\
\frac{7}{8}-70\\
x-1\\\\Cross \ multiplication\\\\
\frac{7}{8}=70x\ \ \ | divide\ by\ 70\\\\
x=\frac{1}{80}\\\\
In\ 1\ min\ Melinda\ will\ paint\ \frac{1}{80}\ of \ wall.
[/tex]
