Answer:
7/20
Step-by-step explanation:
First, we need to find a common denominator.
The easiest way to do this is to look at the factors of each number:
4: 1, 2, 4
10:1, 2, 5, 10
Therefore, we can conclude that 20 would be a good denominator.
= 
= 
5 + 2 = 7.
Thus,
is our final answer.