Here's how you add
Since our denominators match, we can add the numerators.
1 + 3 = 4
This yields the answer
The last step is to reduce the fraction if we can.
To find out, we try dividing 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. 5 is larger than 4. So we're done reducing.
And we're done! Here's the final answer to 1/11 + 3/11