e) 2 5/6 · 6/17;

e) $$2 \frac{5}{6} \cdot \frac{6}{17} = \frac{2 \cdot 6 + 5}{6} \cdot \frac{6}{17} = \frac{17}{6} \cdot \frac{6}{17} = \frac{17 \cdot 6}{6 \cdot 17} = \frac{102}{102} = 1$$

Ответ: 1