A man two flats for $675958 each. On one he gains 12% while on the other he loses 12%. How much does he gain or lose in the whole transaction?
Choose one.
A) 1.44 % B) 2.56 % C) 3.12 % D) 4.65 % E) 5.12 %

Rationale: "in such a case there is always a loss loss % = ( 12 / 10 ) ^ 2 = 36 / 25 = 1.44 % answer is a"
Answer: A