A man buys an article of $ 27.50 and sells it for $ 28.60. What is his percentage gain?

A) 3 %

B) 4 %

C) 6 %

D) None of these

S.P= $ 28.60 , C.P= $ 27.50

Gain= S.P – C.P 

        = $ 28.60  – $ 27.50

        = $ 1.1

Percentage Gain = Gain/ C.P x 100 

                               = (1.1/27.50) x 100

                               = 4%