Here's an example of adding up four fractions:
2 3 5 2 12
--- + --- + --- + --- = ----
7 7 7 7 7
Convert improper fraction 12/7 to mixed number 1 5/7
4 5 7 6 22
--- + --- + --- + --- = ----
9 9 9 9 9
Convert improper fraction 22/9 to mixed number 2 4/9
Now you get to try a few for yourself.