Question 970229
Common denominator is 4*3 or 12.  You can always get a common denominator by multiplying all the denominators.

(3/4) + (1/3)= (9/12) + (4/12)

you multiply top and bottom by the same number.  The bottom number will determine the top.  You will have to make 4 become 12, and you multiply by 3.  You do the same thing to the top.  You are multiplying by 3/3  which is 1 and doesn't change it.

The second term, 1/3, is multiplied top and bottom by 4.

Now you can add the two, because the denominators are the same.

13/12  is the answer, or 1 1/12.