Solutions by everydaycalculation.com
1st number: 1 9/21, 2nd number: 3 7/21
3021 - 7021 is -4021.
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Related: 60/21-70/21 30/42-70/21 30/21-70/42 90/21-70/21 30/63-70/21 30/21-70/63
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