The MegaTek Corporation is displaying its distribution of employees by department in a circle graph. The size of each sector of the graph representing a department is proportional to the percentage of total employees in that department. If the section of the circle graph representing the manufacturing department takes up 180° of the circle, what percentage of MegaTek employees are in manufacturing? Pick:
A) 20 %
B) 25 %
C) 30 %
D) 35 %
E) 50 %

Rationale: "answer : e 180 ° divided by 360 ° equals 0.5 , therefore the sector is equal to 50 % of the total"
Answer: E