11/21 (eleven over twenty-one)
Converting to twentieths, we get 8 over 20 minus 15 over 20, resulting in minus 7 over 20.
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14
2
0.27
4/7 minus 5/12 = 13/84
Eleven fifteenths minus ten fifteenths is equal to one fifteenth.
14/20 minus 3/5 is 1/10
2 minus 2/5 plus 1/2 minus 4 = -1.9
-7.2
seven over twelve