If the length & width of a rectangle is decreased by 50% & then again increase the new length & width by 40%. Calculate the percentage difference between the area of New Rectangle & Original Rectangle.
Choose the correct choice: A) 50% B) 51% C) 52% D) 53% E) 54%
let length is l, width is w so area is wl   after decreament l is i/2 ,w is w/2   again inc by 40% so l is 7l/10 ,w is 7w/10 so area is 49wl/100   percentage change is wl-49wl/100=51wl/100   so 51%   ANSWER:51%
<result>B</result>
If the length & width of a rectangle is decreased by 50% & then again increase the new length & width by 40%. Calculate the percentage difference between the area of New Rectangle & Original Rectangle.