\[\frac{8y - 5}{7y} - \frac{2y - 1}{7y} - \frac{10 - y}{7y} =\]
\[= \frac{8y - 5 - 2y + 1 - 10 + y}{7y} =\]
\[= \frac{7y - 14}{7y} = \frac{7(y - 2)}{7y} = \frac{y - 2}{y}.\]