Solutions by everydaycalculation.com
1st number: 4/20, 2nd number: 1 8/20
420 - 2820 is -65.
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Related: 8/20-28/20 4/20-56/20 4/40-28/20 4/20-28/40 12/20-28/20 4/20-84/20 4/60-28/20 4/20-28/60 28/20-28/20
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