(19$\frac{5}{8}$ :$\frac{7}{12}$ -13$\frac{1}{4}$ :$\frac{7}{12}$ ).$\frac{4}{5}$)
=($\frac{157}{8}$ :$\frac{7}{12}$ -$\frac{53}{4}$ :$\frac{7}{12}$).$\frac{4}{5}$
=$\frac{7}{12}$ :($\frac{157}{8}$ -$\frac{53}{4}$ ).$\frac{4}{5}$
=($\frac{7}{12}$: $\frac{14}{153}$ ).$\frac{4}{5}$
=$\frac{14}{153}$ .$\frac{4}{5}$ =$\frac{306}{35}$