1)сократите дробь а)24/30 б)12/48 в)20/36 г) 14/56 д) 44/100 е)32/72 ж)36/60 з)18/90...

а) $\frac{24}{30}= \frac{6*4}{6*5}= \frac{4}{5}$
б) $\frac{12}{48}= \frac{12}{12*4}= \frac{1}{4}$
в) $\frac{20}{36}= \frac{5*4}{9*4}= \frac{5}{9}$
г) $\frac{14}{56}= \frac{14}{14*4}= \frac{1}{4}$
д) $\frac{44}{100}= \frac{11*4}{4*25}= \frac{11}{25}$
е) $\frac{32}{72}= \frac{8*4}{8*9}= \frac{4}{9}$
ж) $\frac{36}{60}= \frac{12*3}{12*5}= \frac{3}{5}$
з) $\frac{18}{90}= \frac{18}{18*5}= \frac{1}{5}$
и) $\frac{66}{99}= \frac{33*2}{33*3}= \frac{2}{3}$
к) $\frac{98}{112}= \frac{7*14}{8*14}= \frac{7}{8}$
2) $\frac{4}{9}= \frac{2*4}{9*2}= \frac{8}{18}$
$\frac{5}{6}= \frac{5*3}{6*3}= \frac{15}{18}$
$\frac{7}{2}= \frac{7*9}{2*9}= \frac{63}{18}$
$\frac{7}{8}= \frac{7*10}{8*10}= \frac{70}{80}$
$\frac{5}{16}= \frac{5*5}{16*5}= \frac{25}{80}$
$\frac{21}{40}= \frac{21*2}{40*2}= \frac{42}{80}$