A number is increased by 50% and then decreased by 50%, the final value of the number is ?
Pick one.
A) decrease by 20% B) decrease by 22% C) decrease by 23% D) decrease by 21% E) decrease by 25%
Here, x = 50 and y = - 50   Therefore, the net % change in value   = ( x + y + xy/100)%   = [50 - 50 + (50 * -50)/100]% or - 25%   Since the sign is negative, there is a decrease in value by 25%.   ANSWdecrease by 25%R: decrease by 25%
<result>E</result>
A number is increased by 50% and then decreased by 50%, the final value of the number is ?