Ответ:

  1. \(\frac{42}{24}=\frac{42:6}{24:6}=\frac{7}{4}\).
  2. \(\frac{35}{77}=\frac{35:7}{77:7}=\frac{5}{11}\).
  3. \(\frac{48}{60}=\frac{48:12}{60:12}=\frac{4}{5}\).
  4. \(\frac{72}{96}=\frac{72:24}{96:24}=\frac{3}{4}\).

Ответ: \(\frac{7}{4};\ \frac{5}{11};\ \frac{4}{5};\ \frac{3}{4}\).