- $$y \cdot 76 = 88$$
$$y = \frac{88}{76} = \frac{22}{19} \approx 1.158$$
- $$y \cdot 70 = 98$$
$$y = \frac{98}{70} = \frac{14}{10} = 1.4$$
- $$y \cdot 84 = 18$$
$$y = \frac{18}{84} = \frac{3}{14} \approx 0.214$$
- $$y \cdot 44 = 4$$
$$y = \frac{4}{44} = \frac{1}{11} \approx 0.091$$
- $$y \cdot 63 = 54$$
$$y = \frac{54}{63} = \frac{6}{7} \approx 0.857$$
Ответ: 17) 22/19; 18) 1.4; 19) 3/14; 20) 1/11; 21) 6/7