Solutions by everydaycalculation.com
1st number: 5/12, 2nd number: 2 8/20
512 - 4820 is -11960.
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Related: 10/12-48/20 5/12-96/20 5/24-48/20 5/12-48/40 15/12-48/20 5/36-48/20 5/12-48/60 25/12-48/20 5/60-48/20 35/12-48/20 5/84-48/20
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