\[\left( 6\frac{3}{4} - 5\frac{1}{8}\ :1\frac{9}{32} \right)\ :2\frac{1}{5} =\]
\[= \left( 6\frac{3}{4} - \frac{41}{8} \cdot \frac{32}{41} \right)\ :\frac{11}{5} =\]
\[= 2\frac{3}{4}\ :\frac{11}{5} = \frac{11}{4} \cdot \frac{5}{11} = \frac{5}{4} = 1\frac{1}{4}\]