выполните действия (1 3/5+1,8)*1/2

Решите задачу:

$(1\frac{3}{5}+1,8)*\frac{1}{2}=(1\frac{3}{5}+1\frac{8}{10})*\frac{1}{2}=\\=(1\frac{3}{5} +1\frac{4}{5})*\frac{1}{2}=2\frac{7}{5}*\frac{1}{2}=3\frac{2}{5}*\frac{1}{2}=\frac{17}{5}*\frac{1}{2}=\frac{17}{10} =1,7$

$(6-4\frac{8}{15}):2,2= (5\frac{15}{15}- 4\frac{8}{15}):2,2= 1 \frac{7}{15}:2,2= \frac{22}{15}: \frac{11}{5} = \frac{22}{15}* \frac{5}{11}= \frac{2}{3}$