Price at which Jenna bought a single tee shirt = $4.50
Selling price of each tee shirt $6
Then
Profit on each tee shirt made by Jenna = (6 - 4.50) dollars
= 1.50 dollars
Percentage of profit made by Jenna on each shirt = (1.5/4.5) * 100 percent
= 150/4.5 percent
= 33.33 percent.
The percentage on the mark up price for Jenna was 33.33%.
I hope I have helped you and
the procedure for doing such problems is clear to you.