First, we set up our problem.
5/7+3/8.
Then we find our least common denominator.
Our LCD is 56.
We multiply what we did in the bottom to the top.
Here's our problem so far.
40/56+21/56
Next, we add 40 and 56.
40+21=61.
Now we have 61/56.
An improper fraction.
We simplify it.
Our final answer is 1 5/56. (Fully simplified)
Have a nice day! :)