Solutions by everydaycalculation.com
1st number: 4/21, 2nd number: 7 5/7
421 - 547 is -15821.
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Related: 8/21-54/7 4/42-54/7 4/21-54/14 12/21-54/7 4/63-54/7 4/21-54/21 20/21-54/7 4/21-54/35 28/21-54/7 4/21-54/49
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