Answer the following question, with explanation first.
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?

160
65% of the library books are for adults because 100 - 35 = 65.

There are 160 library books in total because 104 /.

65 = 160.

.

The answer is 160