Ответ:\(\frac{3}{4}=\frac{3\cdot3}{4\cdot3}=\frac{9}{12}\).\(\frac{5}{6}=\frac{5\cdot2}{6\cdot2}=\frac{10}{12}\).Ответ: 1) \(\frac{9}{12}\); 2) \(\frac{10}{12}\).