Решение:
- \( 3 \frac{5}{11} = \frac{3 \cdot 11 + 5}{11} = \frac{33 + 5}{11} = \frac{38}{11} \)
- \( 18 \frac{1}{4} = \frac{18 \cdot 4 + 1}{4} = \frac{72 + 1}{4} = \frac{73}{4} \)
- \( 1 \frac{16}{17} = \frac{1 \cdot 17 + 16}{17} = \frac{17 + 16}{17} = \frac{33}{17} \)
Ответ: a) $$\frac{38}{11}$$, б) $$\frac{73}{4}$$, в) $$\frac{33}{17}$$.