Answer: C. 1/2
Explanation:
The coefficient is the number being multiplied by q. The sum is the additive total. To add fractions, they need a common denominator.
2/3 = 4/6
Adding a negative is the same as subtracting.
4/6 + (-1/6) = 4/6 - 1/6 = 3/6 = 1/2
Hope this helps!