Помогите решить, пожалуйста

$( \frac{5}{18}- \frac{7}{12}*0.5 ): \frac{5}{18} - \frac{2}{3}=$

$(\frac{5}{18}- \frac{7}{12}*0.5 ): \frac{5}{18} - \frac{2}{3}= \\ 1) -\frac{7}{12} * \frac{5}{10} = \frac{35}{120} = - \frac{7}{24} \\ 2) \frac{5}{18}- (- \frac{7}{24})= \frac{20+21}{72} = \frac{41}{72} \\ 3) \frac{41}{72} : \frac{5}{18}= \frac{41}{72} * \frac{18}{5} = \frac{41}{20} \\ 4) \frac{41}{20}- \frac{2}{3}= \frac{123-40}{60}= \frac{83}{60}$ .