Solutions by everydaycalculation.com
1st number: 4/21, 2nd number: 1 9/12
421 - 2112 is -13184.
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Related: 8/21-21/12 4/21-42/12 4/42-21/12 4/21-21/24 12/21-21/12 4/21-63/12 4/63-21/12 4/21-21/36 20/21-21/12 4/21-21/60 28/21-21/12 4/21-21/84
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