Solutions by everydaycalculation.com
1st number: 1 2/14, 2nd number: 1 4/12
1614 - 1612 is -421.
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Related: 32/14-16/12 16/14-32/12 16/28-16/12 16/14-16/24 48/14-16/12 16/14-48/12 16/42-16/12 16/14-16/36 80/14-16/12 16/14-80/12 16/70-16/12 16/14-16/60 16/98-16/12 16/14-16/84
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