Question

Ralph sold brownies for ​$0.27 a piece in order to earn money to buy baseball cards. If the cards cost ​$1.35 per​ pack, and if Ralph had no money left over after buying​ them, what is the least number of brownies he must have​ sold?

Answer 1

99(15) = 1.35x14.85 = 1.35x14.85/1.35 = 11
I think it is 15. I am not sure about the proper way to solve this....I just know that if he sold 15 brownies, he could buy 11 packs with exactly no change left over.