Solutions by everydaycalculation.com
1st number: 20/42, 2nd number: 1 3/12
2042 - 1512 is -6584.
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Related: 40/42-15/12 20/42-30/12 20/84-15/12 20/42-15/24 60/42-15/12 20/42-45/12 20/42-15/36 20/42-75/12 20/42-15/60 20/42-15/84
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