Question

You can buy a 40 oz jar of peanut butter for $5.25 or you can buy a 15 oz jar for $2.10. Which is the better deal?

Answer 1

$\begin{gathered} In\text{ the first case, the cost per oz is } \\ \frac{5.25}{40}=0.13125 \\ \\ In\text{ the second, } \\ \frac{2.10}{15}=0.14 \\ \\ \text{The one with the less cost per oz will be the better deal, that means the first is the better deal!} \end{gathered}$