Which is the better deal: 8 ounces of shampoo for $0.89 or 12 ounces of $1.47?

Question

Can someone please explain to me how to do this problem.

Answer 1

0.89 / 8 = $0.11 per ounce

1.47 / 12 = $0.12 per ounce

Answer 2

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Answer 3

0.89 / 8 = $0.11 per ounce

1.47 / 12 = $0.12 per ounce