Answer:
15/14 or 1+1/14
Explanation:
So what you are going to want to do is expand the denominator from the first fraction to be the same as the second one so you can add them. Since 7 times 2 is 14, you can multiply the top and bottom of 3/7 by 2 and get 6/14.
6/14 + 9/14 = 15/14 or 1+1/14.