Задание 78: Выполните деление.

1) \( \frac{3}{4} : \frac{5}{7} = \frac{3}{4} \times \frac{7}{5} = \frac{21}{20} \). \( \frac{25}{18} : \frac{25}{27} = \frac{25}{18} \times \frac{27}{25} = \frac{27}{18} = \frac{3}{2} \). \( \frac{9}{16} : \frac{3}{64} = \frac{9}{16} \times \frac{64}{3} = \frac{576}{48} = 12 \). \( \frac{25}{72} : \frac{45}{63} = \frac{25}{72} \times \frac{63}{45} = \frac{1575}{3240} = \frac{175}{324} \).