0
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Expressed as a mixed number in its simplest form, 6 3/7 - 20/21 = 5 10/21 or five and ten twenty-firsts.
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0.84 which is also 84%
No. A factored form of one can not be used here.
63 minus 21 is 42.
It is 21 minus 100 = -79
21 minus -5 is 26.