a collection of books went on sale , and 2 / 3 of them were sold for $ 2.25 each . if none of the 40 remaining books were sold , what was the total amount received for the books that were sold ?
"if 40 books constitute 1 / 3 rd of the total , then 2 / 3 rd of the total = 80 books amount received for sold books = 80 * 2.25 = $ 180 answer : e"
multiply(2, divide(multiply(40, divide(2, 3)), divide(const_1, 3)))