Solutions by everydaycalculation.com
1st number: 14/21, 2nd number: 1 7/21
1421 - 2821 is -23.
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Related: 28/21-28/21 14/21-56/21 14/42-28/21 14/21-28/42 42/21-28/21 14/21-84/21 14/63-28/21 14/21-28/63 70/21-28/21 98/21-28/21
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