Solutions by everydaycalculation.com
1st number: 12/16, 2nd number: 1 3/5
1216 - 85 is -1720.
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Related: 24/16-8/5 12/16-16/5 12/32-8/5 12/16-8/10 36/16-8/5 12/16-24/5 12/48-8/5 12/16-8/15 60/16-8/5 12/16-40/5 12/80-8/5 12/16-8/25 84/16-8/5 12/16-56/5 12/16-8/35
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