A man’s wages were decreased by 50%. Again, the reduced wages were increased by 50%. He has a loss of?	Answers:  A) 35 %  B) 25 %  C) 20 %  D) 30 %  E) none of these

Rationale: here , x = - 50 and y = 50 therefore , the net % change in value = ( x + y + xy / 100 ) % = [ - 50 + 50 + ( - 50 x 50 ) / 100 ] % or - 25 % since the sign is negative , there is loss of 25 % answer : b
Answer: B