Question 1142303
one 12 ounce bottle costs 2.50
one 8 ounce bottle costs 1.75.


what you did is possible, but can be confusing.


you got the number of ounces per dollar.


12 / 2.50 = 4.8 ounces per dollar.
8 / 1.75 = 4.57 ounces per dollar.


you then assumed that the less ounces per dollar was cheaper.
in fact, the more ounces per dollar is cheaper.


what you should have done is get the cost per ounce.


2.50 / 12 = .20833
1.75 / 8 = .21875


the 12 ounce can is cheaper because the cost per ounce is cheaper.


another way i do it sometimes is this.


12 ounce can is 2.50
8 ounce can is 1.75


i look for the least common multiple, which is 24.


24 = 2 * 12 = 2 * 2.50 = 5 dollars.
24 = 3 * 8 = 3 * 1.75 = 5.25 dollars.


12 ounce can is cheaper.


you had the right idea, but you should have gotten dollars / ounce, and not ounces / dollar.