Question

PLEASE HELP MEH PLEASE!! Select all pairs of ratios that form a proportion. (2 answers guys)!

1/6,4/20
7/9,28/36
14/18,21/27
30/80,6/18

Answer 1

1:6
1:5
7:9
7:9
7:9
7:9
3:8
1:3

Answer 2

7/9, 28/36
30/80,6/18