8. 5/12 + 1/8 * 3/8 =

8. $$\frac{5}{12} + \frac{1}{8} \cdot \frac{3}{8} = \frac{5}{12} + \frac{3}{64} = \frac{5^{(16}}{12} + \frac{3^{(3}}{64} = \frac{80}{192} + \frac{9}{192} = \frac{80 + 9}{192} = \frac{89}{192}$$

Ответ: 89/192