Solutions by everydaycalculation.com
1st number: 4/20, 2nd number: 2 14/20
420 - 5420 is -52.
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Related: 8/20-54/20 4/40-54/20 4/20-54/40 12/20-54/20 4/60-54/20 4/20-54/60 28/20-54/20
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