78. Выполните деление: 1) $$\frac{4}{9}$$ : $$\frac{7}{8}$$; 2) $$\frac{6}{25}$$ : $$\frac{12}{35}$$ ,

78.1

$$\frac{4}{9}$$ : $$\frac{7}{8}$$ = $$\frac{4}{9}$$ * $$\frac{8}{7}$$ = $$\frac{4 * 8}{9 * 7}$$ = $$\frac{32}{63}$$

Ответ: $$\frac{32}{63}$$

78.2

$$\frac{6}{25}$$ : $$\frac{12}{35}$$ = $$\frac{6}{25}$$ * $$\frac{35}{12}$$ = $$\frac{6 * 35}{25 * 12}$$ = $$\frac{210}{300}$$ = $$\frac{7}{10}$$

Ответ: $$\frac{7}{10}$$