Ответ:

\(\frac{29}{4}:\frac{4}{5}=\frac{29}{4}\cdot\frac{5}{4}=\frac{145}{16}\).

\(3-1\frac{19}{30}=3-\frac{49}{30}=\frac{41}{30}\).

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

\(\frac{145}{16}-\frac{41}{40}=\frac{725-164}{80}=\frac{561}{80}=7\frac{1}{80}\).

Ответ: \(7\frac{1}{80}\).