\[\frac{23^{\backslash 2}}{40} - \frac{9^{\backslash 4}}{20} + \frac{1^{\backslash 5}}{16} = \frac{46 - 36 + 5}{80} =\]
\[= \frac{15}{80} = \frac{5 \cdot 3}{5 \cdot 16} = \frac{3}{16}\]