Помогите пожалусто номер 915....

Решите задачу:

$0.9*(1 \frac{5}{9} - \frac{4}{9} :( \frac{5}{8} + \frac{3}{8} ):3))= \frac{1}{5} \\ \\ 1) \frac{5}{8} + \frac{3}{8}= \frac{8}{8} =1 \\ \\ 2)1:3= \frac{1}{3} \\ \\$

$3) \frac{4}{9} : \frac{1}{3} = \frac{4*3}{9} = \frac{4}{3} \\ \\ 4)1 \frac{5}{9} - \frac{4}{3} = \frac{14}{9} - \frac{12}{9} = \frac{2}{9} \\ \\ 5) \frac{9}{10} * \frac{2}{9} = \frac{9*2}{10*9} = \frac{2}{10} = \frac{1}{5}$