Solutions by everydaycalculation.com
1st number: 1/3, 2nd number: 1 3/5
13 - 85 is -1915.
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Related: 2/3-8/5 1/3-16/5 1/6-8/5 1/3-8/10 1/3-24/5 1/9-8/5 1/3-8/15 5/3-8/5 1/3-40/5 1/15-8/5 1/3-8/25 7/3-8/5 1/3-56/5 1/21-8/5 1/3-8/35
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