Solutions by everydaycalculation.com
1st number: 18/21, 2nd number: 4 1/6
1821 - 256 is -13942.
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Related: 36/21-25/6 18/21-50/6 18/42-25/6 18/21-25/12 54/21-25/6 18/21-75/6 18/63-25/6 18/21-25/18 90/21-25/6 18/21-25/30 18/21-25/42
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