Question

after her honeymoon,lisa decided to transform her wedding invitation into a piece of framed artwork for her living room. to do so,she enlarged the lenght and width of her rectangular wedding invitation by 80%.unfortunately, the resulting invitation was too large for the custom frame lisa ordered,so she reduced the length and width of the invitation by 50%.the area of the final invitation is what % larger(or smaller) than the area of the original?
a)19% smaller b)40% smaller c)10%larger d)19%larger

Answer 1

area A  is enlarged to  A(1.80)  (1.80)  = 3.24 A

Then the Area : 3.24 A is reduced to  3.24 A * (1/2)*(1/2) = 0.81 A

So it is 19% smaller.