Solutions by everydaycalculation.com
1st number: 2/3, 2nd number: 1 15/21
23 - 3621 is -2221.
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Related: 4/3-36/21 2/3-72/21 2/6-36/21 2/3-36/42 6/3-36/21 2/9-36/21 2/3-36/63 10/3-36/21 2/15-36/21 14/3-36/21 2/21-36/21
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