Найдите частное:

• а) $$4\frac{5}{4}:\frac{2}{15} = \frac{21}{4} \cdot \frac{15}{2} = \frac{21 \cdot 15}{4 \cdot 2} = \frac{315}{8} = 39\frac{3}{8}$$
• б) $$\frac{2}{3}:\frac{8}{9} = \frac{2}{3} \cdot \frac{9}{8} = \frac{2 \cdot 9}{3 \cdot 8} = \frac{18}{24} = \frac{3}{4}$$
• в) $$\frac{64}{131}:\frac{32}{52} = \frac{64}{131} \cdot \frac{52}{32} = \frac{64 \cdot 52}{131 \cdot 32} = \frac{2 \cdot 52}{131} = \frac{104}{131}$$
• г) $$\frac{64}{125}:4 = \frac{64}{125} \cdot \frac{1}{4} = \frac{64}{125 \cdot 4} = \frac{16}{125}$$
• д) $$9:\frac{3}{4} = 9 \cdot \frac{4}{3} = \frac{9 \cdot 4}{3} = \frac{36}{3} = 12$$
• е) $$9:4 = \frac{9}{4} = 2\frac{1}{4}$$
• ж) $$1\frac{3}{7}:1\frac{1}{14} = \frac{10}{7}:\frac{15}{14} = \frac{10}{7} \cdot \frac{14}{15} = \frac{10 \cdot 14}{7 \cdot 15} = \frac{2 \cdot 2}{3} = \frac{4}{3} = 1\frac{1}{3}$$
• з) $$2\frac{1}{3}:7\frac{1}{9} = \frac{7}{3}:\frac{64}{9} = \frac{7}{3} \cdot \frac{9}{64} = \frac{7 \cdot 9}{3 \cdot 64} = \frac{7 \cdot 3}{64} = \frac{21}{64}$$