11, as 11-12-(-12) is the same as 11 + (-12+12), and -12 +12 cancels out to zero, leaving you with 11 + 0 = 11.
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9/4 minus 4/3 is 11/12.
12 minus 1/3 equals 11 and 2/3.
(4 x 12) - (154/11) = 34
1/4 = 3/12 11/12 - 3/12 = 8/12 = 2/3
11/12 minus 2/3 is 1/4.