How many 8 oz glasses equal 72 oz?

To determine how many 8 oz glasses equal 72 oz, you simply divide 72 by 8. The result is 9, meaning that 9 glasses of 8 oz each equal 72 oz. This calculation is based on the fact that there are 8 ounces in one glass, so dividing the total number of ounces by the size of each glass gives you the number of glasses needed.