At the bookstore, 40 copies of a popular paperback book fit perfectly on a 5-foot shelf. How many copies of this book would fit perfectly on an 8-foot shelf?
64 copies would fit perfectly because 40 fit perfectly in 5-foot shelf witch means 8 per foot. Then it says you have an 8 foot-shelf and 8 copies fit per foot so 64 copies would fit perfectly in an 8 foot shelf.
First, you can divide 40 by 5 to get 8. That gives you 8 books per foot. From there, you'd multiply 8 books per foot times 8 feet available to get the answer of 64. So 64 books would fit perfectly on an 8-foot shelf.
