Solutions by everydaycalculation.com
1st number: 4 0/3, 2nd number: 10/21
123 - 1021 is 7421.
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Related: 24/3-10/21 12/3-20/21 12/6-10/21 12/3-10/42 36/3-10/21 12/3-30/21 12/9-10/21 12/3-10/63 60/3-10/21 12/3-50/21 12/15-10/21 84/3-10/21 12/3-70/21 12/21-10/21
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