Answer:
7/12
Explanation:
You have to find the closest common denominator which in this case is twelve. Multiply each number separately to get the denominator to 12. For this problem, you would have to multiply 1/3 by 4 to get 4/12 and 1/4 by 3 to get 3/12. You then add 4/12 and 3/12 together to get 7/12.