11/12 - 3/4 = 1/6
1/2 + 4/9 = 17/18
11/12 - 3/4
= 11-9/12
= 2/12
= 1/6
1/2 + 4/9
= 9+8/18
= 17/18
Hence the solution to the expression in it's simplest form is 1/6 and 17/18
Read more on simplest form here
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