Rapid va rog
.
.
.
.
.
.
.

b) 1/6:7/12=1/6×12/7=2/7
c) 1/3:2/9=1/3×9/2=3/2
d) 5/8:2/3=5/8×3/2=15/16
e) 7/9:1/3=7/9×3=21/9=7/3