Solutions by everydaycalculation.com
1st number: 9/21, 2nd number: 4 6/21
921 - 9021 is -277.
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Related: 18/21-90/21 9/42-90/21 9/21-90/42 27/21-90/21 9/63-90/21 9/21-90/63 45/21-90/21 63/21-90/21
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