Robert's salary was decreased by 50% and subsequently increased by 50%. how much percentage does he lose? Pick:	A) 10 %	B) 20 %	C) 25 %	D) 30 %	E) 50 %

Rationale: "let original salary be $ 100 new final salary = 150 % of ( 50 % of $ 100 ) = ( 150 / 100 ) * ( 50 / 100 ) * 100 = $ 75 decrease = 25 % correct option is c"
Answer: C