12 men can complete a piece of work in 25 days. In how many days can 20 men complete that piece of work? Choose the most appropriate option.
A) 55 days	B) 77 days	C) 20 days	D) 88 days	E) 15 days

Rationale: "12 * 25 = 20 * x = > x = 15 days answer : e"
Answer: E