Solutions by everydaycalculation.com
1st number: 3/20, 2nd number: 1 5/15
320 - 2015 is -7160.
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Related: 6/20-20/15 3/20-40/15 3/40-20/15 3/20-20/30 9/20-20/15 3/20-60/15 3/60-20/15 3/20-20/45 15/20-20/15 3/20-20/75 21/20-20/15
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