fracciones operaciones

Calcula y simplifica:
- \frac{8}{3} + \frac{3}{4} \left ( - \frac{2}{5} \right )

SOLUCIÓN

- \frac{8}{3} + \frac{3}{4} \left ( - \frac{2}{5} \right )

- \frac{8}{3} - \frac{6}{20}
m.c.m.(3,20)=60
- \frac{8 \cdot 20}{60} - \frac{6 \cdot 3}{60}
 \frac{-160 -18}{60} = \frac{-178}{60}=\frac{-89}{30}