Solutions by everydaycalculation.com
1st number: 4/21, 2nd number: 2 3/6
421 - 156 is -9742.
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Related: 8/21-15/6 4/21-30/6 4/42-15/6 4/21-15/12 12/21-15/6 4/21-45/6 4/63-15/6 4/21-15/18 20/21-15/6 4/21-75/6 4/21-15/30 28/21-15/6 4/21-15/42
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