1/3:1/9
3/8:1/2
4/9:8/9
1/12:1/6​

Ответ:

1/3:1/9 = 1/3*9/1 = 1/1*3/1 = 3/1 = 3

3/8:1/2= 3/8*2/1 = 3/4*1/1=3/4 = 0.75

4/9:8/9= 4/9*9/8 =1/1*1/2 = 1/2 = 0.5

1/12:1/6 = 1/12:6/1 = 1/2:1/1 = 1/2= 0.5