Solutions by everydaycalculation.com
1st number: 15/20, 2nd number: 1 1/15
1520 - 1615 is -1960.
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Related: 30/20-16/15 15/20-32/15 15/40-16/15 15/20-16/30 45/20-16/15 15/20-48/15 15/60-16/15 15/20-16/45 75/20-16/15 15/20-80/15 15/20-16/75
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