Answer: the percentage of the original cost will the customer pay is 86.5%
Explanation:
Let x represent the original cost.
During a christmas sales event the dealership offers a 13.5% discount off of the retail price. This means that 13.5% was offered off x. The amount that the customer will pay is
x - (13.5/100 × x) = x - 0.135x = 0.865x
The percentage of the original cost that the customer will pay will be determined by dividing the new amount by the original cost and multiplying it by 100. It becomes.
0.865x/x × 100 = 0.865 ×100
= 86.5%