Since d=3, take your pencil and write the fraction again, except wherever 'd' appears, write a '3' there instead.
Then you'll have a fraction with nothing but numbers in it, and you can easily simplify and find the value of the fraction.
I did it in my head as I was looking over the picture, and I found that the value of the fraction is between 5 and 10. I don't want to just hand you the answer, because I know that you can do it.
