Solutions by everydaycalculation.com
1st number: 7/14, 2nd number: 1 19/21
714 - 4021 is -5942.
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Related: 7/14-80/21 7/28-40/21 7/14-40/42 21/14-40/21 7/42-40/21 7/14-40/63 35/14-40/21 7/70-40/21 49/14-40/21 7/98-40/21
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