\(\frac{3}{8} : \frac{3}{4} \cdot \frac{2}{3} = \frac{3}{8} \cdot \frac{4}{3} \cdot \frac{2}{3} = \frac{1}{2} \cdot \frac{2}{3} = \frac{1}{3}\)
б)\(\frac{10}{7} \cdot \frac{3}{4} : \frac{5}{14} = \frac{10}{7} \cdot \frac{3}{4} \cdot \frac{14}{5} = \frac{3}{2} \cdot 2 = 3\)
в)\(\frac{9}{8} : \frac{5}{8} : \frac{3}{10} = \frac{9}{8} \cdot \frac{8}{5} \cdot \frac{10}{3} = \frac{9}{5} \cdot \frac{10}{3} = 3 \cdot 2 = 6\)