This is how you add
Since our denominators match, we can add the numerators.
2 + 1 = 3
That gives us the sum, which is
Now, do we need to simplify this fraction?
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. 5 is larger than 3. So we're done reducing.
And we're done! Here's the final answer to 2/10 + 1/10