Solutions by everydaycalculation.com
1st number: 18/21, 2nd number: 1 13/15
1821 - 2815 is -106105.
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Related: 36/21-28/15 18/21-56/15 18/42-28/15 18/21-28/30 54/21-28/15 18/21-84/15 18/63-28/15 18/21-28/45 90/21-28/15 18/21-28/75
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