1/3÷1/9
3/8÷1/2
4/9÷8/9
1/12÷1/6

1/3:1/9 = 1/3*9/1 = 1/1*3/1 = 3/1 = 33/8:1/2= 3/8*2/1 = 3/4*1/1=3/4 = 0.754/9:8/9= 4/9*9/8 =1/1*1/2 = 1/2 = 0.51/12:1/6 = 1/12:6/1 = 1/2:1/1 = 1/2= 0.5