Ответ:

  1. \(\frac{27}{36}=\frac{27:9}{36:9}=\frac{3}{4}\).
  2. \(\frac{50}{75}=\frac{50:25}{75:25}=\frac{2}{3}\).
  3. \(\frac{112}{80}=\frac{112:16}{80:16}=\frac{7}{5}\).

Ответ: \(\frac{3}{4},\ \frac{2}{3},\ \frac{7}{5}\).