She paid $8.25 for 3 pounds of fresh fish the previous week. This week she paid $1.20 more for the same purchase. The price per pound this week can be calculated below
[tex]\begin{gathered} previuos\text{ w}eek\text{ price = \$8.25} \\ \text{This w}eek\text{ price = 1.20+8,25 =\$9.45 } \\ \text{Therefore, per pound can be computed as follows} \\ 3\text{ pounds = \$9.45} \\ 1\text{ pound = ? } \\ \text{cross multiply} \\ \text{price per pound = }\frac{9.45}{3} \\ \text{price per pound=}3.15\text{ dollars per pound} \end{gathered}[/tex]