Q: A library has a number of books. 35% of them are intended for children and 104 of them are for adults. How many books are in the library?
A: 160
Explain how we arrive at this answer:
Explanation: 65% of the library books are for adults because 100 - 35 = 65. There are 160 library books in total because 104 / .65 = 160.