Arectangle is 12 feet long and 5 feet wide. if the length of the rectangle is increased by 25% and the width is decreased by 20%, what is the change in the area of the rectangle?
the change in the area of the rectangle is
square feet.

Original area was as follows
Area=L*W
A=12*5
A=60 sq ft

If the length of 12 is increased by 25% do the following.

12*0.25=3

12+3=15

If the width of 5 is decreased by 20% do the following.

5*0.2=1

5+1=6

With these calculation we can now determine the new area

Area=L*W
A=15*6
A=90 sq ft

With this information we now know that with the increase in length and the decrease in width the new rectangle is 30 sq ft larger than the original rectangle.