Solutions by everydaycalculation.com
1st number: 1 7/20, 2nd number: 1 10/20
2720 - 3020 is -320.
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Related: 54/20-30/20 27/20-60/20 27/40-30/20 27/20-30/40 81/20-30/20 27/20-90/20 27/60-30/20 27/20-30/60
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