Solutions by everydaycalculation.com
1st number: 12/21, 2nd number: 1 15/21
1221 - 3621 is -87.
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Related: 24/21-36/21 12/21-72/21 12/42-36/21 12/21-36/42 36/21-36/21 12/63-36/21 12/21-36/63 60/21-36/21 84/21-36/21
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