Answer
12/10, 18/15, 24/20
Explanation
Given the ratio:

If we multiply the numerator and the denominator by the same number, we will get an equivalent ratio. For example, multiplying by 2, 3, and 4, we get:
![\begin{gathered} (6)/(5)=\frac{6*2}{5\operatorname{*}2}=(12)/(10) \\ (6)/(5)=\frac{6*3}{5\operatorname{*}3}=(18)/(15) \\ (6)/(5)=\frac{6*4}{5\operatorname{*}4}=(24)/(20) \end{gathered}]()
Then, 12/10, 18/15, and 24/20 are equivalent to 6/5