Calculate the effect changes in dimension of a rectangle will have on its area, if length is increased by 15% and its breadth is decreased by 10%? Choices.
A) 3.5 percent increase  B) 9.5 percent increase  C) 1.5 percent increase  D) 3.9 percent increase  E) 3.5 percent increase

Rationale: "let l and b be 100 each 100 * 100 = 10000 l increase by 15 % = 115 b decrease by 10 % = 90 115 * 90 = 10350 3.5 percent increase answer : e"
Answer: E