Answer:
The ratio 12/15 is not equivalent to the other three
Step-by-step explanation:
To know which of the ratios is not equivalent to the other three, let us break all the ratios doen to the simplest form, and see which one is different.
2/3 is in its simplest form
6/9 = 2/3
12/15 = 4/5
18/27 = 2/3
12/15 is the odd one .