Todd purchased a stereo from a wholesaler for $400 and then sold it in his electronics warehouse for $450. What was his markup as a percentage of his purchase price? Enter your answer with the percent symbol- no space between the number and the percent sign. If you have a decimal in your answer, include it right before the percent symbol. For example, if my answer was 39.25 percent, I would simply type 39.25%. Make sure you remember your answer should be in percent form!