Solutions by everydaycalculation.com
1st number: 1 3/5, 2nd number: 1 8/10
85 - 1810 is -15.
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Related: 16/5-18/10 8/5-36/10 8/10-18/10 8/5-18/20 24/5-18/10 8/5-54/10 8/15-18/10 8/5-18/30 40/5-18/10 8/5-90/10 8/25-18/10 8/5-18/50 56/5-18/10 8/35-18/10 8/5-18/70
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