ANSWER
[tex]2.5\text{ pounds}[/tex]EXPLANATION
To find the answer, we have to apply proportions:
[tex]\begin{gathered} 1\text{ pound = 16 ounces} \\ x\text{ pounds = 40 ounces} \end{gathered}[/tex]Now, cross-multiply:
[tex]\begin{gathered} x\cdot16=1\cdot40 \\ \Rightarrow x=\frac{40}{16} \\ x=2.5 \end{gathered}[/tex]Therefore, 40 ounces is equal to 2.5 pounds.