Solutions by everydaycalculation.com
1st number: 9/21, 2nd number: 4 1/12
921 - 4912 is -30784.
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Related: 18/21-49/12 9/21-98/12 9/42-49/12 9/21-49/24 27/21-49/12 9/63-49/12 9/21-49/36 45/21-49/12 9/21-49/60 63/21-49/12 9/21-49/84
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