okay so i have this word problem. The measurements of the upper portion of the hutch, in inches, were: 9 3/4, 12 9/16, 10 3/8, and 16 7/16. The total hight of the hutch is 82 3/8inches.

a)what is the height of the upper portion?
b)what is the height of the lower portion?

9 12/16

12 9/16
10 6/16
16 7/16
---------
47 34/16
=49 1/8
82 3/8 - 49 1/8 = 33 2/8 = 33 1/4