Represent the shaded area in the drawing with the appropriate fraction.
[Graphs generated by this script: setBorder(0); initPicture(-0.25,10.25,-0.25,10.25);stroke="black";fill="cyan";rect([0,0],[5,5]);fill="white";rect([0,5],[5,10]);fill="cyan";rect([5,0],[10,5]);fill="white";rect([5,5],[10,10]);]