(add explanation on how you did it)

First add all the numbers together. Then add all the 90 and above answers together. Make a fraction of the 90s and above over the total. then divide the numerator by the denominator.

area of part 1:

a1=base*height/2=(8+2)*(8-2-2-1)/2=10*3/2=15 ft^2

area of part 2:

a2=length*width=(8+2)*1=10 ft2

area of part 3:

a3=length*width=8*2=16 ft2

total shaded area : a1+a2+a3=41 ft2

total area of the reactangle : a=16*8=128 ft2

total area of the nonshaded region : 128-41=87 ft2

are you an artist's daughter? cuz dang you a fine piece of art, girl.