Solutions by everydaycalculation.com
1st number: 1 7/20, 2nd number: 1 5/10
2720 - 1510 is -320.
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Related: 54/20-15/10 27/20-30/10 27/40-15/10 27/20-15/20 81/20-15/10 27/20-45/10 27/60-15/10 27/20-15/30 27/20-75/10 27/20-15/50 27/20-15/70
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