You're right, that's the required operation. [tex] \frac{184}{12.4}=15.08[/tex] Because they want to know how many glasses can be full, the answer is 15.
Yes, you are right divide 184/12.4 = 14.8 . In this case you will round up because the number after the decimal point is more than five. Your answer will be 15 glasses.
