Выполните действия: (8 7/12—2 17/36)·2 7/10—4 1/3:13/20

Решите задачу:

$(8\frac{21}{36} - 2 \frac{17}{36}) \times \frac{27}{10} - \frac{13}{3} \times \frac{20}{13} = \\ = 6 \frac{4}{36} \times \frac{27}{10} - \frac{20}{3} = \\ = 6 \frac{1}{9} \times \frac{27}{10} - \frac{20}{3} \: = \\ = \frac{55}{9} \times \frac{27}{10} - \frac{20}{3} = \\ = \frac{33}{2} - \frac{20}{3} = \\ = \frac{99 - 40}{6} = \frac{59}{6} = 9 \frac{5}{6}$