Solutions by everydaycalculation.com
1st number: 1 7/20, 2nd number: 1 8/10
2720 - 1810 is -920.
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Related: 54/20-18/10 27/20-36/10 27/40-18/10 27/20-18/20 81/20-18/10 27/20-54/10 27/60-18/10 27/20-18/30 27/20-90/10 27/20-18/50 27/20-18/70
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