Solutions by everydaycalculation.com
1st number: 1 4/12, 2nd number: 1 6/12
1612 - 1812 is -16.
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Related: 32/12-18/12 16/12-36/12 16/24-18/12 16/12-18/24 48/12-18/12 16/12-54/12 16/36-18/12 16/12-18/36 80/12-18/12 16/12-90/12 16/60-18/12 16/12-18/60 16/84-18/12 16/12-18/84
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