Ответ:

Преобразуем смешанные числа: \(5\frac{4}{5}=\frac{29}{5}\), \(1\frac{19}{30}=\frac{49}{30}\).

\(\frac{29}{4}:\frac{29}{5}=\frac{29}{4}\cdot\frac{5}{29}=\frac{5}{4}\).

\(3-\frac{49}{30}=\frac{90}{30}-\frac{49}{30}=\frac{41}{30}\).

\(\frac{3}{4}\cdot\frac{41}{30}=\frac{41}{40}\).

\(\frac{5}{4}-\frac{41}{40}=\frac{50}{40}-\frac{41}{40}=\frac{9}{40}\).

Ответ: \(\frac{9}{40}\).