5. Выполните деление: а) 3/8 : 2/3; б) 4/7 : 4/9; в) 11 2/5 : 3 4/5; г) 16/17 : 8; д) 4 1/11 : 2 19/22; е) 18 : 9/14; ж) −2 1/8 : 4 1/4; з) −16/17 : (−4).

1. \(\frac{3}{8}:\frac{2}{3}=\frac{3}{8}\cdot\frac{3}{2}=\frac{9}{16}\).
2. \(\frac{4}{7}:\frac{4}{9}=\frac{4}{7}\cdot\frac{9}{4}=\frac{9}{7}=1\frac{2}{7}\).
3. \(11\frac{2}{5}:3\frac{4}{5}=\frac{57}{5}:\frac{19}{5}=3\).
4. \(\frac{16}{17}:8=\frac{16}{17}\cdot\frac{1}{8}=\frac{2}{17}\).
5. \(4\frac{1}{11}:2\frac{19}{22}=\frac{45}{11}:\frac{63}{22}=\frac{10}{7}=1\frac{3}{7}\).
6. \(18:\frac{9}{14}=18\cdot\frac{14}{9}=28\).
7. \(-2\frac{1}{8}:4\frac{1}{4}=-\frac{17}{8}:\frac{17}{4}=-\frac{1}{2}\).
8. \(-\frac{16}{17}:(-4)=\frac{16}{17}\cdot\frac{1}{4}=\frac{4}{17}\).

Ответ: а) \(\frac{9}{16}\); б) \(1\frac{2}{7}\); в) 3; г) \(\frac{2}{17}\); д) \(1\frac{3}{7}\); е) 28; ж) \(-\frac{1}{2}\); з) \(\frac{4}{17}\).