Ryan had a stack of 1,200 books in his shop. He sold 75 on Monday, 50 on Tuesday, 64 on Wednesday, 78 on Thursday and 135 on Friday. What percentage of the books were not sold?
Answer 66.5 percent
Start by letting N equal the total number of books sold. So: N = 75 + 50 + 64 + 78 + 135 = 402 Let M be the books NOT sold: M = 1,200 - N = 1200 - 402 = 798 Solve the percentage: Books not sold / total number of books = 798/1200 = 0.665 = 66.5%
Asked by Tom Tennant · Last updated 5 years ago · 3.6K views · SOURCE
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