This is how to add
Since our denominators match, we can add the numerators.
1 + 1 = 2
Now we have an answer.
Last of all, we need to simplify the fraction, if possible. Can it be reduced to a simpler fraction?
To find out, we try dividing it by 2...
No good. So next you try the next prime number, which is 3...
No good. 3 is larger than 2. So we're done reducing.
And we're done! Here's the final answer to 1/9 + 1/9