Solutions by everydaycalculation.com
1st number: 3/20, 2nd number: 1 15/20
320 - 3520 is -85.
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Related: 6/20-35/20 3/20-70/20 3/40-35/20 3/20-35/40 9/20-35/20 3/60-35/20 3/20-35/60 15/20-35/20 21/20-35/20
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