解:
$\begin{aligned}&(\frac{1}{2}-\frac{3}{4}-\frac{5}{8})\div(-\frac{5}{8})\\=&(\frac{1}{2}-\frac{3}{4}-\frac{5}{8})\times(-\frac{8}{5})\\=&\frac{1}{2}\times(-\frac{8}{5})-\frac{3}{4}\times(-\frac{8}{5})-\frac{5}{8}\times(-\frac{8}{5})\\=&-\frac{4}{5}+\frac{6}{5}+1\\=&\frac{2}{5}+1\\=&\frac{7}{5}\end{aligned}$