Ashirt is on sale for 30% off. the sale price is $51.50. what was the orginail price?

The answer is $329.00
To contract an original price from a sale price, use:
Original price- Original Price*Mark-down percent = Sale Price, or
Original price- Original price *(Mark-down precent) = sale price
To do a do a double mark-down problem, we must do this twice for the 10%:
Original Sale Price*(1-10%)= $207.27
Original Sale Price = $207.27/0.9 = 230.30.
For the pre-sale discount price.
Original Price *(1-30%)= $230.30
Original Price= 230.30/0.7 = $329.00

The correct answer is: b