Solutions by everydaycalculation.com
1st number: 3/21, 2nd number: 1 19/21
321 - 4021 is -3721.
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Related: 6/21-40/21 3/21-80/21 3/42-40/21 3/21-40/42 9/21-40/21 3/63-40/21 3/21-40/63 15/21-40/21
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