16) 1 - 4 5/17

$$
1 - 4\frac{5}{17} = 1 - \frac{4 \cdot 17 + 5}{17} = 1 - \frac{68 + 5}{17} = 1 - \frac{73}{17} = \frac{17}{17} - \frac{73}{17} = -\frac{56}{17} = -3\frac{5}{17}
$$

Ответ: -3 5/17