Ответ:

  1. \(2\frac{2}{3}=\frac{2\cdot3+2}{3}=\frac{8}{3}\).
  2. \(2\frac{5}{6}=\frac{2\cdot6+5}{6}=\frac{17}{6}\).
  3. \(7\frac{1}{4}=\frac{7\cdot4+1}{4}=\frac{29}{4}\).
  4. \(8\frac{3}{4}=\frac{8\cdot4+3}{4}=\frac{35}{4}\).

Ответ: \(\frac{8}{3};\ \frac{17}{6};\ \frac{29}{4};\ \frac{35}{4}\).