Solutions by everydaycalculation.com
1st number: 5/20, 2nd number: 4 4/20
520 - 8420 is -7920.
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Related: 10/20-84/20 5/40-84/20 5/20-84/40 15/20-84/20 5/60-84/20 5/20-84/60 25/20-84/20 35/20-84/20
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