She will be able to fill 10 cups with kool-aid because 5 ÷ 1/2 = 10
I would say A) is your answer.
This is my choice, so I might be wrong.
Glad I could help, and good luck!
For this case we propose a rule of three:
67 grams -----------> 22%
x grams --------------> 100%
Where:
The variable "x" represents the recommended amount of daily carbohydrates.
So, we have:

Rounding we have the recommended amount, in grams, of carbohydrates: 305 grams
Answer:
305 grams
rate of blowing balloons of Alexa = 15/20 = 0.75
rate of blowing balloons of Sara = 18/25 = 0.72
rate of blowing balloons of Shirley= 16/21 = 0.76
rate of blowing balloons of Sam = 12/23 = 0.52
from above calculation we concluded Shirley can blow balloons at the fastest rate!