



 
Hi, 33 1/3% is the fraction 1/3 so the tshirt sale was one third off. There was one third off and hence Joe paid two thirds of the original price. Hence $12 is two thirds of the original price and thus $6 is one third of the original price. If $6 is one third of the original price then the original price must have been $18. Check:
There is a more algebraic wy to solve this problem. Let $P be the original price then since Joe paid two thirds of the original price
Multiply both sides by 3 to get
divide both sides by 2 and you get
I hope this helps,  


Math Central is supported by the University of Regina and The Pacific Institute for the Mathematical Sciences. 