Robert's salary was decreased by 70% and subsequently increased by 70%. how much percentage does he lose?
Pick.
A) 10% B) 20% C) 25% D) 30% E) 49%
let original salary be $100   Salary after decreasing 70% = 100 - 100 x 70/100 = $30   Salary after increasing 70% on $30 = 30 + 30 x 70/100 = $51   Percentage of loss = 100 - 51= 
<gadget id="calculator">100 - 51</gadget>
<output>49</output>
49%   Answer : 49%
<result>E</result>
Robert's salary was decreased by 70% and subsequently increased by 70%. how much percentage does he lose?