Solutions by everydaycalculation.com
1st number: 4/21, 2nd number: 7 1/9
421 - 649 is -43663.
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Related: 8/21-64/9 4/42-64/9 4/21-64/18 12/21-64/9 4/63-64/9 4/21-64/27 20/21-64/9 4/21-64/45 28/21-64/9 4/21-64/63
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