17. Деление дробей. Найти частные:

1) $\frac{5}{9} : \frac{3}{4} = \frac{5}{9} \cdot \frac{4}{3} = \frac{20}{27}$ 2) $\frac{2}{3} : 5 = \frac{2}{3} \cdot \frac{1}{5} = \frac{2}{15}$ 3) $7 : 9 = \frac{7}{9}$ 4) $5 : \frac{1}{15} = 5 \cdot 15 = 75$ 5) $7 \frac{1}{2} : 11 \frac{1}{4} = \frac{15}{2} : \frac{45}{4} = \frac{15}{2} \cdot \frac{4}{45} = \frac{2}{3}$ 6) $17 : 43 = \frac{17}{43}$ 7) $\frac{2}{9} : 9 = \frac{2}{9} \cdot \frac{1}{9} = \frac{2}{81}$ 8) $\frac{1}{6} : \frac{2}{5} = \frac{1}{6} \cdot \frac{5}{2} = \frac{5}{12}$ 9) $21 : \frac{3}{7} = 21 \cdot \frac{7}{3} = 7 \cdot 7 = 49$ 10) $4 \frac{2}{3} : 3 \frac{8}{9} = \frac{14}{3} : \frac{35}{9} = \frac{14}{3} \cdot \frac{9}{35} = \frac{6}{5} = 1 \frac{1}{5}$ 11) $18 : 37 = \frac{18}{37}$ 12) $12 : \frac{3}{4} = 12 \cdot \frac{4}{3} = 4 \cdot 4 = 16$ 13) $\frac{2}{9} : 9 = \frac{2}{9} \cdot \frac{1}{9} = \frac{2}{81}$ 14) $\frac{7}{12} : \frac{49}{60} = \frac{7}{12} \cdot \frac{60}{49} = \frac{1 \cdot 5}{1 \cdot 7} = \frac{5}{7}$ 15) $3 \frac{3}{5} : \frac{24}{25} = \frac{18}{5} : \frac{24}{25} = \frac{18}{5} \cdot \frac{25}{24} = \frac{3 \cdot 5}{1 \cdot 4} = \frac{15}{4} = 3 \frac{3}{4}$