Two-third of a positive number and 144/216 of its reciprocal are equal. The number is:  Choose the correct choice from the following choices:  A) 5 / 12  B) 12 / 5  C) 25 / 144  D) 144 / 25  E) 1

Rationale: "let the number be x . then , 2 / 3 x = 144 / 216 * 1 / x x 2 = 144 / 216 * 3 / 2 = 144 / 144 x = 1 answer : e"
Answer: E