900 men have provisions for 15 days. If 200 more men join them, for how many days will the provisions last now?  Answers:
A) 12.88 B) 12.6 C) 12.55 D) 12.21 E) 12.27

Rationale: "900 * 15 = 1100 * x x = 12.27 . answer : e"
Answer: E