Let's add


Step 1Since our denominators match, we can add the numerators. 7 + 4 = 11 So what's the answer so far?


Step 2Can this fraction be reduced? First, we attempt to divide it by 2... No good. So next you try the next prime number, which is 3... No good. So next you try the next prime number, which is 5... No good. So next you try the next prime number, which is 7... No good. So next you try the next prime number, which is 11... No good. 11 is larger than 9. So we're done reducing. And we're done! Here's the final answer to 7/9 + 4/9
