Answer: 7/8
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Work Shown:
3/8 + 1/2
3/8 + 4/8
(3+4)/8
7/8
The diagram is shown below.
There are two different visual ways to represent adding these fractions. I prefer the rectangular format in figure 2, but some people like the pizza version better in figure 1. The 3/8 portion is color-coded in red while the 1/2 = 4/8 version is color-coded in green. Adding the two separate regions results in 7/8 of the overall figure being shaded in.