An 18 oz jar of peanut butter cost $2.19. A 48 oz jar of peanut butter sells for $4.39. Which size jar is the better buy?

So you divide 2.19 by 18 and you get. 12 so it cost 12 cents per ounce

then you divide 4.39 by 48 and you get. 09 so it cost 9 cents per ounce

So it would be better idea to but the 48 ounce jar because it costs less oer ounce of peanut butter

2.19/18 = 0.12167 per ounce

4.39/48 = 0.09 per ounce

the larger jar is the better buy