Explanation

Let’s define selling price as Selling price = S, Purchasing price = P and Markup = M. We can summarize the information in the question stem as follows:

S = P + M P = 10 M = S/10

Therefore, S = 10 + S/10 10S = 100 + S or 9S = 100 S = 100/9

Profit = Markup = S/10 =10/9

**The correct choice is C.**

S = P + M P = 10 M = S/10

Therefore, S = 10 + S/10 10S = 100 + S or 9S = 100 S = 100/9

Profit = Markup = S/10 =10/9