The length of a rectangle is doubled while its width is doubled. What is the % change in area? Pick one:
A) 250% B) 300% C) 500% D) 650% E) 700%
The original area is L*W   The new area is 2L*2W = 4*L*W   2 *2= 
<gadget id="calculator">  2 *2</gadget>
<output>4</output>
4*L*W= L*W + 3*L*W   The area increased by 300%.   The answer is 300%.
<result>B</result>
The length of a rectangle is doubled while its width is doubled. What is the % change in area?