In a public show 60 % of the seats were filled. If there were 600 seats in the hall, how many seats were vacant?  Answers.
A) 100
B) 110
C) 120
D) 140
E) 240

Rationale: "75 % of 600 = 60 / 100 × 600 = 360 therefore , the number of vacant seats = 600 - 360 = 240 . answer : e"
Answer: E