Respuesta :

12/15

What goes into 12 and 15?
The number 3. 

12/3=4
15/3=5

I hope this guided you into the right answer. Hint:) It's not C or D. 
The correct answer choice would be choice A.

- 12/15 is equivalent to 8/10

- 4/5 is equivalent to 8/10

- 10/12 is equivalent to 8.3/10

- 60/80 is equivalent to 7.5/10

- 60/45 is equivalent to 10.3/10