cross-multiply to check. For #1, forexample does
9*12 = 4*25? No.
so check the others
Which ratio is form a proportion
4/9,12/25
7/3,18/42
5/11,20/45
5/8/15/25
1 answer
4/9,12/25
7/3,18/42
5/11,20/45
5/8/15/25
1 answer