Assuming length is denoted by L And breadth by b. Then initial area of rectangle = L.b But as given condition final length (L’) = 1.1L …………..(10% increase). Final breadth (b’) = 0.9b …………..(10% decrease) . Hence final area of the rectangle = L’.b’ =1.1L×0.9b =0.99Lb Thus it is 1% less than initial area.