Step-by-step explanation: This is only for the area of a 2D shape such as rectangles and squares. To find other areas, such as triangles, you have to do l (x) w divided by 2.
Since we know that the markdown is $20 by subtracting 80-60 , we find out what percent of 20 is 80. To do that you do 20/80, which is 0.25, or 25 percent.
