Сократите дробь, используя признак делимости:1) 11/22,10/25,27/45,9/12. 2) 15/18,...

Решите задачу:

$\frac{11}{22} = \frac{1*11}{2*11} = \frac{1}{2}$
$\frac{10}{25} = \frac{2*5}{5*5} = \frac{2}{5}$
$\frac{27}{45} = \frac{3*9}{5*9} = \frac{3}{5}$
$\frac{9}{12} = \frac{3*3}{4*3} = \frac{3}{4}$

$\frac{15}{18} = \frac{5*3}{6*3} = \frac{5}{6}$
$\frac{24}{30} = \frac{4*6}{5*6} = \frac{4}{5}$
$\frac{28}{32} = \frac{7*4}{8*4} = \frac{7}{8}$
$\frac{21}{15} = \frac{7*3}{5*3} = \frac{7}{5} =1 \frac{2}{5}$