Solutions by everydaycalculation.com
1st number: 1 7/20, 2nd number: 4 2/10
2720 - 4210 is -5720.
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Related: 54/20-42/10 27/20-84/10 27/40-42/10 27/20-42/20 81/20-42/10 27/60-42/10 27/20-42/30 27/20-42/50 27/20-42/70
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