3) а) \(\frac{14}{17}\cdot\frac{34}{63}\); в) \(\frac{51}{103}\cdot\frac{103}{119}\); д) \(24\cdot\frac{11}{48}\); ж) \(3\frac{5}{14}:7\).

а) \(\frac{14}{17}\cdot\frac{34}{63}=\frac{14\cdot2}{63}=\frac{28}{63}=\frac{4}{9}\).

в) \(\frac{51}{103}\cdot\frac{103}{119}=\frac{51}{119}=\frac{3}{7}\).

д) \(24\cdot\frac{11}{48}=\frac{24}{48}\cdot11=\frac{1}{2}\cdot11=\frac{11}{2}=5\frac{1}{2}\).

ж) \(3\frac{5}{14}:7=\frac{47}{14}:7=\frac{47}{14\cdot7}=\frac{47}{98}\).

Ответ: а) \(\frac{4}{9}\); в) \(\frac{3}{7}\); д) \(5\frac{1}{2}\); ж) \(\frac{47}{98}\).