24. 5 3/17 - 2 5/17

$$5 \frac{3}{17} - 2 \frac{5}{17} = (5-2) + (\frac{3}{17} - \frac{5}{17}) = 3 - \frac{2}{17} = 2 \frac{17}{17} - \frac{2}{17} = 2 \frac{15}{17}$$

Ответ: $$2 \frac{15}{17}$$