A man two flats for $675958 each. On one he gains 11% while on the other he loses 11%. How much does he gain or lose in the whole transaction?
Select:
A) 1.21 %
B) 2.56 %
C) 3.12 %
D) 4.65 %
E) 5.12 %

Rationale: "in such a case there is always a loss loss % = ( 11 / 10 ) ^ 2 = 23 / 19 = 1.21 % answer is a"
Answer: A