Выполните вычитание: 7 9/20-5 17/30.

\[7\frac{9^{\backslash 3}}{20} - 5\frac{17^{\backslash 2}}{30} = 7\frac{27}{60} - 5\frac{34}{60} =\]

\[= 6\frac{87}{60} - 5\frac{34}{60} = 1\frac{53}{60}\]