Robert's salary was decreased by 50% and subsequently increased by 50%. how much percentage does he lose?
Choose the correct choice from the following answers:
A) 10%
B) 20%
C) 25%
D) 30%
E) 50%
let original salary be $100   new final salary = 150% of (50% of $100) = (150/100)*(50/100)*100= 
<gadget id="calculator">(150/100)*(50/100)*100</gadget>
<output>75</output>
$75   decrease= 25%   correct option is 25%
<result>C</result>
Robert's salary was decreased by 50% and subsequently increased by 50%. how much percentage does he lose?