You see a used car you wish to buy. the dealer quotes you a price of $11,550. you have a blue book quotation of $8,400 for the same model and year. how much markup on cost is the dealer using?

37.5%

Step-by-step explanation:

We have been given that the dealer quotes you price of a car $11,550. You have a blue book quotation of $8,400 for the same model and year.

First of all, we will subtract the blue book quotation price from the price quoted by dealer to get the amount of markup.

Now, we will find $3,150 is what percent of $8,400.

Therefore, the dealer is using 37.5% of markup on the cost.