Выполните деление:

1) $$rac{8m}{n} : \frac{4m}{n} = \frac{8m}{n} \cdot \frac{n}{4m} = \frac{8m \cdot n}{n \cdot 4m} = \frac{8}{4} = 2$$

Ответ: 2

2) $$rac{3b}{8} : b = \frac{3b}{8} : \frac{b}{1} = \frac{3b}{8} \cdot \frac{1}{b} = \frac{3b \cdot 1}{8 \cdot b} = \frac{3}{8}$$

Ответ: $$rac{3}{8}$$

3) $$rac{7c^2}{d} : \frac{c}{d^3} = \frac{7c^2}{d} \cdot \frac{d^3}{c} = \frac{7c^2 \cdot d^3}{d \cdot c} = 7cd^2$$

Ответ: $$7cd^2$$