Solutions by everydaycalculation.com
1st number: 10/21, 2nd number: 1 3/12
1021 - 1512 is -6584.
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Related: 20/21-15/12 10/21-30/12 10/42-15/12 10/21-15/24 30/21-15/12 10/21-45/12 10/63-15/12 10/21-15/36 50/21-15/12 10/21-75/12 10/21-15/60 70/21-15/12 10/21-15/84
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