Answer:
2. 40
Explanation:
Since we know that 9/15 has to be the same thing as 24/y
We know that 9/15 is .60 or 60%.
24/y has to be the same
If we slowly try every answer. 24/30, 24/40, 24/48, 24/58
We know that 24/40 equals .60 or 60% as well.
Therefore, your answer would be 2. 40