Solutions by everydaycalculation.com
1st number: 4/21, 2nd number: 5 3/12
421 - 6312 is -42584.
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Related: 8/21-63/12 4/42-63/12 4/21-63/24 12/21-63/12 4/63-63/12 4/21-63/36 20/21-63/12 4/21-63/60 28/21-63/12 4/21-63/84
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