A. 1/4 + 1/8
3/4 x 1/2 = 3/8
1/4 + 1/8 can be simplified into 2/8 + 1/8 which is 3/8.
4.47, if you put it in a calculator, not sure if teacher wants something different.
15 1/5+ 4 3/8
151/5+43/8 you simplify to 1423/40
Then, there is you're result.
I hope this helped you to understand this.:)