I am trying to help my wife figure out the measurements of signs she needs to make for two windows at her new studio space. Local building codes specify the sign can only be 40 percent of the total area of the window. One window is 79" wide by 57" tall and the other window is 55" wide and 57" tall. I know how to get the square inches and using basic math get 40 percent of that but what I am needing is what the new width and height measurements would be. This is stumping me. Please Help.