79. Найдите частное: 1) 6 : 2/7; 2) 1 : 8/19; 3) 7/25 : 28; 4) 16 1/3 : 5 5/6; 5) 2 2/3 : 2 2/7; 6) 4 4/9 : 5/27.

1. \(6:\frac{2}{7}=6\cdot\frac{7}{2}=21\).
2. \(1:\frac{8}{19}=\frac{19}{8}=2\frac{3}{8}\).
3. \(\frac{7}{25}:28=\frac{7}{25}\cdot\frac{1}{28}=\frac{1}{100}\).
4. \(16\frac{1}{3}:5\frac{5}{6}=\frac{49}{3}\cdot\frac{6}{35}=2\frac{4}{5}\).
5. \(2\frac{2}{3}:2\frac{2}{7}=\frac{8}{3}\cdot\frac{7}{16}=1\frac{1}{6}\).
6. \(4\frac{4}{9}:\frac{5}{27}=\frac{40}{9}\cdot\frac{27}{5}=24\).

Ответ: 1) \(21\); 2) \(2\frac{3}{8}\); 3) \(\frac{1}{100}\); 4) \(2\frac{4}{5}\); 5) \(1\frac{1}{6}\); 6) \(24\).