Solutions by everydaycalculation.com
1st number: 4/21, 2nd number: 8 0/7
421 - 567 is -16421.
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Related: 8/21-56/7 4/42-56/7 4/21-56/14 12/21-56/7 4/63-56/7 4/21-56/21 20/21-56/7 4/21-56/35 28/21-56/7 4/21-56/49
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