Question

a 12-ounce bottle of shampoo costs $4.20. A 16-ounce bottle costs $6.88. which shampoo costs less per ounce?

Answer 1

It would be the 12 ounce bottle. Basically take the cost of the shampoo bottle and divide it by the amount of ounces it has. The first bottle cost $0.35 per ounce, whereas the second bottle cost $0.43 per ounce.