6 - (1 2/9 + 3 11/12) + 0.25 =

6 - (11/9 + 47/12) + 0.25 =

6 - (44/36 + 47/36) + 0.25 =

6 - (91/36) + 0.25 =

6 - 2.5277 + 0.25 =

3.7223 + 0.25 =

3.9723