Solutions by everydaycalculation.com
1st number: 1 4/12, 2nd number: 1 9/12
1612 - 2112 is -512.
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Related: 32/12-21/12 16/12-42/12 16/24-21/12 16/12-21/24 48/12-21/12 16/12-63/12 16/36-21/12 16/12-21/36 80/12-21/12 16/60-21/12 16/12-21/60 16/84-21/12 16/12-21/84
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