A 21 cm long wire is to be cut into two pieces so that one piece will be 2/5th of the other, how many centimeters will the shorter piece be?
Choose one.
A) 12  B) 6  C) 88  D) 77  E) 14

Rationale: "1 : 2 / 5 = 5 : 2 2 / 7 * 21 = 6 answer : b"
Answer: B