Solutions by everydaycalculation.com
1st number: 3/20, 2nd number: 2 10/15
320 - 4015 is -15160.
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Related: 6/20-40/15 3/20-80/15 3/40-40/15 3/20-40/30 9/20-40/15 3/60-40/15 3/20-40/45 15/20-40/15 3/20-40/75 21/20-40/15
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