Question

Решите 14/39 : 21/52; 4 1/11 : 2 19/22; 18 : 9/14

Answer 1

14/39:21/52=14/39*52/21=2*4/3*3=8/9
4 1/11:2 19/22=45/11*22/63=5*2/1*7=10/7=1 3/7
18:9/14=18*14/9=2*14/1=28

Answer 2

$\frac{14}{39} : \frac{21}{52} = \frac{14}{39} * \frac{52}{21} = \frac{8}{9}$

$4 \frac{1}{11}:2 \frac{19}{22}= \frac{45}{11}: \frac{63}{22}= \frac{45}{11} * \frac{22}{63}= \frac{10}{7} =1 \frac{3}{7}$

$18: \frac{9}{14} = 18* \frac{14}{9} =2*14=28$