Question

An insulated cooler holds 184 ounces of lemonade. How many full 12.4 ounce glasses of lemonade can be poured from the cooler?

I'm assuming its 184 divided by 12.4

Answer 1

You're right, that's the required operation.
$\frac{184}{12.4}=15.08$
Because they want to know how many glasses can be full, the answer is 15.

Answer 2

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.