Solutions by everydaycalculation.com
1st number: 6/21, 2nd number: 1 9/21
621 - 3021 is -87.
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Related: 12/21-30/21 6/21-60/21 6/42-30/21 6/21-30/42 18/21-30/21 6/21-90/21 6/63-30/21 6/21-30/63 30/21-30/21 42/21-30/21
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