12 3/8 -9.25 - 0.8 x 3.6

12 3/8= 12, 375
12,375-9,25-0,8×3,6
12,375-9,25-2,88
3,125-2,88= 0,245

12 3/8 = 12,375.

= 12,375 - 9,25 - (0,8 × 3,6).
= 12,375 - (9,25 + 2,88).
= 12,375 - 12,13.
= 0,245.