The ratio of new books to all books will be 6/15 and the ratio of used books to all books will be 9/15.
What is the ratio?
The ratio is the comparison of two numbers.
We have,
New books = 6
Used books = 9
So,
Total books = 6 + 9 = 15,
A. The ratio of new books to all books;
So,
The ratio of new books to all books = 6/15
B. The ratio of used books to all books;
So,
The ratio of used books to all books = 9/15
Hence we can say that the ratio of new books to all books is 6/15 and the ratio of used books to all books is 9/15.
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