Answer:
There are 1700 books in the library.
Step-by-step explanation:
If 28% of the books is non-fiction, that means the remaining 72% of books are fiction.
If 72% of the books are fiction, 1224/72 will give us 1%, which is 17.
If 1% is 17 books, then 17*100=100% of books.
There are 1700 books in the library.
