Question

At the store deli, Rita spent $13.45 on 5 pounds of cheese. How much would it cost to buy 2 pounds of cheese.

Answer 1

We assume the cost is proportional to the amount of cheese purchased.

`\frac{\$13.45}{5\,\text{pounds}}=\frac{\text{cost}}{2\,\text{pounds}}\\\\\text{cost}=(2\,\text{pounds})*\frac{\$13.45}{5\,\text{pounds}}=\$13.45*(2)/(5)=\$5.38`

It would cost $5.38 to buy 2 pounds of cheese.