2. Найдите частное: 1) 2 \frac{13}{16} : 4 \frac{3}{8}; 2) 3 \frac{1}{3} : 2 \frac{6}{7}; 3) 3 \frac{6}{7} : \frac{9}{28}.

1) 2 \frac{13}{16} : 4 \frac{3}{8} = \frac{45}{16} : \frac{35}{8} = \frac{45}{16} \cdot \frac{8}{35} = \frac{45 \cdot 8}{16 \cdot 35} = \frac{9 \cdot 1}{2 \cdot 7} = \frac{9}{14}

2) 3 \frac{1}{3} : 2 \frac{6}{7} = \frac{10}{3} : \frac{20}{7} = \frac{10}{3} \cdot \frac{7}{20} = \frac{10 \cdot 7}{3 \cdot 20} = \frac{1 \cdot 7}{3 \cdot 2} = \frac{7}{6} = 1 \frac{1}{6}

3) 3 \frac{6}{7} : \frac{9}{28} = \frac{27}{7} : \frac{9}{28} = \frac{27}{7} \cdot \frac{28}{9} = \frac{27 \cdot 28}{7 \cdot 9} = \frac{3 \cdot 4}{1 \cdot 1} = 12

Ответ: 1) \frac{9}{14}; 2) 1 \frac{1}{6}; 3) 12