39. Сократите дробь: а) 24/60; б) 12/48; в) 20/36; г) 14/56.

1. \(\frac{24}{60}=\frac{24:12}{60:12}=\frac{2}{5}\).
2. \(\frac{12}{48}=\frac{12:12}{48:12}=\frac{1}{4}\).
3. \(\frac{20}{36}=\frac{20:4}{36:4}=\frac{5}{9}\).
4. \(\frac{14}{56}=\frac{14:14}{56:14}=\frac{1}{4}\).

Ответ: а) \(\frac{2}{5}\); б) \(\frac{1}{4}\); в) \(\frac{5}{9}\); г) \(\frac{1}{4}\).