Solutions by everydaycalculation.com
1st number: 4/20, 2nd number: 4 1/12
420 - 4912 is -23360.
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Related: 8/20-49/12 4/20-98/12 4/40-49/12 4/20-49/24 12/20-49/12 4/60-49/12 4/20-49/36 4/20-49/60 28/20-49/12 4/20-49/84
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