2. Найдите частное: 1) $$6 : \frac{2}{7}$$; 2) $$1 : \frac{8}{19}$$; 3) $$\frac{7}{25} : 28$$

1) $$6 : \frac{2}{7} = 6 \cdot \frac{7}{2} = \frac{6 \cdot 7}{2} = \frac{42}{2} = 21$$ 2) $$1 : \frac{8}{19} = 1 \cdot \frac{19}{8} = \frac{19}{8} = 2\frac{3}{8}$$ 3) $$\frac{7}{25} : 28 = \frac{7}{25} \cdot \frac{1}{28} = \frac{7}{25 \cdot 28} = \frac{7}{25 \cdot 4 \cdot 7} = \frac{1}{25 \cdot 4} = \frac{1}{100}$$