Answer:$163.40
The reason that would be the answer is because if the sale is 90% off we have to get that back and in order to do that you must multiply your sale price of $86 by 1.90 remember anything times 1 is itself so your just multiplying the 90% back on but 90% is not a whole, a whole is 1 so 90/100 is going to be equal to 0.9 and that’s how you would get 163.40