9: 3; e) 1음: 3;

$$\frac{9}{13} : 3 = \frac{9}{13} : \frac{3}{1} = \frac{9}{13} \cdot \frac{1}{3} = \frac{9 \cdot 1}{13 \cdot 3} = \frac{3 \cdot 3}{13 \cdot 3} = \frac{3}{13}$$.

Ответ: $$\frac{3}{13}$$