Solutions by everydaycalculation.com
1st number: 18/20, 2nd number: 4 1/12
1820 - 4912 is -19160.
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Related: 36/20-49/12 18/20-98/12 18/40-49/12 18/20-49/24 54/20-49/12 18/60-49/12 18/20-49/36 90/20-49/12 18/20-49/60 18/20-49/84
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