Question

Adam had 91dollars. If he spent 21 dollars on new books, what is the ratio of the money he still has to money he's spent.

Answer 1

3/13

Explanation:

ratio is another way to say fraction, so we have 21/91. This can be reduced if we divide by 7: 21/7 = 3, 91/7 = 13. Now we have 3/13. You can write it as 3:13 or 3/13.