Solutions by everydaycalculation.com
1st number: 8/21, 2nd number: 4 4/9
821 - 409 is -25663.
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Related: 16/21-40/9 8/21-80/9 8/42-40/9 8/21-40/18 24/21-40/9 8/63-40/9 8/21-40/27 40/21-40/9 8/21-40/45 56/21-40/9 8/21-40/63
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