17 10 5 20 34 2

\[ \frac{17}{20} \div \frac{10}{34} \div \frac{5}{2} = \frac{17}{20} \cdot \frac{34}{10} \cdot \frac{2}{5} = \frac{17 \cdot 34 \cdot 2}{20 \cdot 10 \cdot 5} = \frac{1156}{1000} = \frac{289}{250} = 1\frac{39}{250} \]

Ответ: \(1\frac{39}{250}\)