Solutions by everydaycalculation.com
1st number: 3/20, 2nd number: 9 3/5
320 - 485 is -18920.
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Related: 6/20-48/5 3/20-96/5 3/40-48/5 3/20-48/10 9/20-48/5 3/60-48/5 3/20-48/15 15/20-48/5 3/20-48/25 21/20-48/5 3/20-48/35
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