Solutions by everydaycalculation.com
1st number: 4/21, 2nd number: 6 3/12
421 - 7512 is -50984.
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Related: 8/21-75/12 4/42-75/12 4/21-75/24 12/21-75/12 4/63-75/12 4/21-75/36 20/21-75/12 4/21-75/60 28/21-75/12 4/21-75/84
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