We have to use the formula for percent profit with the values given. Doing so, we have:
[tex]\begin{gathered} \text{ \% profit}=\frac{\text{ Selling price - Cost price}}{\text{ Cost price}}\times100=\frac{45-30}{30}\times100\text{ (Replacing the value)} \\ \frac{45-30}{30}\times100=\frac{15}{30}\times100\text{ (Subtracting)} \\ \frac{15}{30}\times100=50\text{ \%} \end{gathered}[/tex]The percent profit is 50%.
