To add fractions together, you must convert the smaller fraction ([tex]\frac{1}{2}[/tex]) to a denominator that matches the other fractions denominator.
In this case, 1/2 would become 4/8
We can add 4/8 to 7/8 to get 11/8
Then we can add the 1 to it, which acts as 8.
Which gives us 19/8
Or 2 3/8