To Find The Original Price, Use the formula S=P−PD, where S equals the sale price of the item, P equals the original price of the item, and D equals the discount percent of the item.
55.5 = P -P(.75) 55.5 = P(1-.75) 55.5 = P(.25) Divide Both Sides By .25 To Get P By Itself 222 = P
Take the percent discount and flip it out of 100% so if the discount is 20% flip it to 80% then make that a decimal so .80 and multiply the original price by the decimal you found so 95*.80 and that's your sale price.