Solutions by everydaycalculation.com
1st number: 9/12, 2nd number: 4 6/12
912 - 5412 is -154.
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Related: 18/12-54/12 9/24-54/12 9/12-54/24 27/12-54/12 9/36-54/12 9/12-54/36 45/12-54/12 9/60-54/12 9/12-54/60 63/12-54/12 9/84-54/12 9/12-54/84
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