Решение:
А) $$0.(2) = \frac{2}{9}$$
Б) $$0.(34) = \frac{34}{99}$$
В) $$5.(62) = 5\frac{62}{99} = \frac{5 \cdot 99 + 62}{99} = \frac{495 + 62}{99} = \frac{557}{99}$$
Г) $$7.(13) = 7\frac{13}{99} = \frac{7 \cdot 99 + 13}{99} = \frac{693 + 13}{99} = \frac{706}{99}$$