Answer :

Well, first I split it up into two different equations:
6-4=2
5/8-2/9=.4027
Then, added the two: 2.4027
53/8 - 39/9 
lowest common factor
8,16,24,32,40,48,56,64,72
9,18,27,36,45,54,63,
72lcf = 72x the first fraction by 9 and the second by
 477/72 - 312/72 =165/72=55/24

in a mixed number t is 2 7/24