66 unit squares each have \dfrac{3}{5}53start fraction, 3, divided by, 5, end fraction of their area shaded.
Not quite sure what you mean. I am going to assume that the question is suppose to say:
There are 66 unit squares, each of them being \(\frac{3}{5}\) of the way shaded. What is the area of the shaded region?
If each of the squares are shaded 3/5 of the way, and each square is a unit square (meaning that it is a 1 by 1 square with an area of 1 unit), and there are 66 squares, the answer is:
66 * 3/5 = 198/5 = 39.5