12 7 : 13 13

$$\frac{12}{13} : \frac{7}{13} = \frac{12}{13} \cdot \frac{13}{7} = \frac{12 \cdot 13}{13 \cdot 7} = \frac{12}{7} = 1\frac{5}{7}$$

Ответ: 1 5/7