The area of the wall that is painted is 75%
How to get the area that is painted
The dimensions of the wall are 12 by 10 feet
The area of the wall would be
12 * 10
= 120
The measurement of the window is 3 by 5 feet
The area of the window will be
3 * 5
= 15 feet in square
since there are two windows, the total feet would be 15 + 15 = 30
Given that the windows are not painted the area remaining would be
120 - 30
= 90
The percentage painted would be
100 x 90/120
= 75%
Hence the area of the wall that is painted is 75%