Solutions by everydaycalculation.com
1st number: 9/12, 2nd number: 1 19/21
912 - 4021 is -9784.
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Related: 18/12-40/21 9/12-80/21 9/24-40/21 9/12-40/42 27/12-40/21 9/36-40/21 9/12-40/63 45/12-40/21 9/60-40/21 63/12-40/21 9/84-40/21
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