Solutions by everydaycalculation.com
1st number: 12/21, 2nd number: 3 7/21
1221 - 7021 is -5821.
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Related: 24/21-70/21 12/42-70/21 12/21-70/42 36/21-70/21 12/63-70/21 12/21-70/63 60/21-70/21 84/21-70/21
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