Solutions by everydaycalculation.com
1st number: 9/21, 2nd number: 2 6/21
921 - 4821 is -137.
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Related: 18/21-48/21 9/21-96/21 9/42-48/21 9/21-48/42 27/21-48/21 9/63-48/21 9/21-48/63 45/21-48/21 63/21-48/21
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