Okay Megan831, the first thing we must do is find a common denominator.
We do this by find what 4 and 6 will both fit into.
In this case they both fit into 12
Now knowing this we want to make 12 the denominator for both 3/4 and 5/6, but we must remember to change to numerator too so that the value of both the numbers doesn't change.
3/4 = 9/12 and 5/6 = 10/12
The problem should now look like this....
9/12 + 10/12
Since the denominator of the two are the same we can simply add the numerators 9 + 10 = 19
, but remember to keep the denominator 12
so it should look something like this.....
19/12