Ответ:
а) \(\frac{8}{9}:\left(\frac{3}{4}+\frac{1}{2}\right)=\frac{8}{9}:\frac{5}{4}=\frac{8}{9}\cdot\frac{4}{5}=\frac{32}{45}\).
б) \(\left(\frac{2}{3}+\frac{2}{7}\right):1\frac{1}{14}=\frac{20}{21}:\frac{15}{14}=\frac{20}{21}\cdot\frac{14}{15}=\frac{8}{9}\).
в) \(\left(\frac{3}{5}-\frac{12}{25}\right):\frac{4}{5}=\frac{3}{25}:\frac{4}{5}=\frac{3}{25}\cdot\frac{5}{4}=\frac{3}{20}\).
г) \(\frac{4}{15}:\left(1\frac{1}{5}-\frac{2}{3}\right)=\frac{4}{15}:\frac{8}{15}=\frac{1}{2}\).
Ответ: а) \(\frac{32}{45}\); б) \(\frac{8}{9}\); в) \(\frac{3}{20}\); г) \(\frac{1}{2}\).
