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Решите задачу:

$\frac{2*5}{3*6} = \frac{2*5}{3*3*2} = \frac{5}{3*3} = \frac{5}{9}$
$\frac{2*7}{9*4} = \frac{2*7}{9*2*2} = \frac{7}{9*2} = \frac{7}{18}$
$\frac{3*5}{20*2} = \frac{3*5}{4*5*2} = \frac{3}{4*2} = \frac{3}{8}$
$\frac{4*3}{9*7} = \frac{4*3}{3*3*7} = \frac{4}{3*7} = \frac{4}{21}$
$\frac{10*3}{23*10} = \frac{3}{23}$
$\frac{10*2}{21*30} = \frac{10*2}{21*3*10} = \frac{2}{63}$
$\frac{4*5}{15*16}= \frac{4*5}{3*5*4*4} = \frac{1}{3*4} = \frac{1}{12}$
$\frac{8*9}{27*16} = \frac{8*9}{3*9*2*8} = \frac{1}{3*2} = \frac{1}{6}$