\frac{4}{5} + (-\frac{6}{5}) : \frac{12}{5} + \frac{3}{8} * (-\frac{8}{5}) = \frac{4}{5} + (-\frac{6}{5}) * \frac{5}{12} + \frac{3}{8} * (-\frac{8}{5}) = \frac{4}{5} - \frac{1}{2} - \frac{3}{5} = \frac{8}{10} - \frac{5}{10} - \frac{6}{10}= -\frac{3}{10}