891. Найдите значение выражения: 1) $$\frac{1\frac{3}{5}:3\frac{3}{5}}{7\frac{5}{12}:1\frac{1}{4}}$$; 2) $$\frac{2^2 \cdot 2,4 \cdot 1\frac{5}{9}}{3\frac{1}{3} \cdot 1,125 \cdot 1\frac{7}{9}}$$.

1) $$\frac{1\frac{3}{5}:3\frac{3}{5}}{7\frac{5}{12}:1\frac{1}{4}} = \frac{\frac{8}{5}:\frac{18}{5}}{\frac{89}{12}:\frac{5}{4}} = \frac{\frac{8}{5} \cdot \frac{5}{18}}{\frac{89}{12} \cdot \frac{4}{5}} = \frac{\frac{8}{18}}{\frac{89}{15}} = \frac{8}{18} \cdot \frac{15}{89} = \frac{4}{9} \cdot \frac{15}{89} = \frac{60}{801} = \frac{20}{267}$$. 2) $$\frac{2^2 \cdot 2,4 \cdot 1\frac{5}{9}}{3\frac{1}{3} \cdot 1,125 \cdot 1\frac{7}{9}} = \frac{4 \cdot 2,4 \cdot \frac{14}{9}}{\frac{10}{3} \cdot 1,125 \cdot \frac{16}{9}} = \frac{4 \cdot \frac{24}{10} \cdot \frac{14}{9}}{\frac{10}{3} \cdot \frac{1125}{1000} \cdot \frac{16}{9}} = \frac{\frac{1344}{90}}{\frac{180000}{27000}} = \frac{\frac{1344}{90}}{\frac{20}{3}} = \frac{1344}{90} \cdot \frac{3}{20} = \frac{1344}{30} \cdot \frac{1}{20} = \frac{1344}{600} = \frac{336}{150} = \frac{168}{75} = \frac{56}{25} = 2\frac{6}{25}$$. Ответ: 1) 20/267; 2) 56/25