Kamal's salary was decreased by 50% and subsequently increased by 30%. How much percent does he lose?  Choose the correct choice from the following choices
A) 30 %
B) 37 %
C) 65 %
D) 35 %
E) 45 %

Rationale: explanation : solution : let original salary = rs . 100 . new final salary = 130 % of ( 50 % of rs . 100 ) = rs . ( 130 / 100 * 50 / 100 * 100 ) = rs . 65 . . ' . decrease = 35 % answer : d
Answer: D