Original Price: $29.99
Mark down: 33 1/3%
Mark down Price: $20.00
29.99 * 33 1/3 = 29.99 * 0.3333 = 9.99 value of mark down.
29.99 - 9.99 = 20.00 new price.
The problem is not really clear. We can assume that $29.99 is the mark down price. We need to look for the original price.
Mark down price: $29.99
Mark down rate : 33 1/3%
Original Price : $44.98
29.99 / ((100% - 33 1/3%) / 100%) = 29.99 / ( 66 2/3% / 100%)
29.99 / 0.6667 = 44.98
