A man two flats for $512456 each. On one he gains 20% while on the other he loses 20%. How much does he gain or lose in the whole transaction? Select the correct option
A) 10% B) 5% C) 12% D) 6% E) 4%
In such a case there is always a loss   Loss% = (20/10)^2 = 4%   Answer is 4%
<result>E</result>
A man two flats for $512456 each. On one he gains 20% while on the other he loses 20%. How much does he gain or lose in the whole transaction?