Ответ:

  1. \(\frac{24}{30}=\frac{24:6}{30:6}=\frac{4}{5}\).
  2. \(\frac{12}{36}=\frac{12:12}{36:12}=\frac{1}{3}\).
  3. \(\frac{28}{48}=\frac{28:4}{48:4}=\frac{7}{12}\).

Ответ: а) \(\frac{4}{5}\); б) \(\frac{1}{3}\); в) \(\frac{7}{12}\).