Solutions by everydaycalculation.com
1st number: 5/12, 2nd number: 1 3/5
512 - 85 is -7160.
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Related: 10/12-8/5 5/12-16/5 5/24-8/5 5/12-8/10 15/12-8/5 5/12-24/5 5/36-8/5 5/12-8/15 25/12-8/5 5/12-40/5 5/60-8/5 5/12-8/25 35/12-8/5 5/12-56/5 5/84-8/5 5/12-8/35
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