Solutions by everydaycalculation.com
1st number: 6/12, 2nd number: 1 9/12
612 - 2112 is -54.
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Related: 6/12-42/12 6/24-21/12 6/12-21/24 18/12-21/12 6/12-63/12 6/36-21/12 6/12-21/36 30/12-21/12 6/60-21/12 6/12-21/60 42/12-21/12 6/84-21/12 6/12-21/84
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