Solutions by everydaycalculation.com
1st number: 1 2/3, 2nd number: 4/21
53 - 421 is 3121.
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Related: 10/3-4/21 5/3-8/21 5/6-4/21 5/3-4/42 15/3-4/21 5/3-12/21 5/9-4/21 5/3-4/63 25/3-4/21 5/3-20/21 5/15-4/21 35/3-4/21 5/3-28/21 5/21-4/21
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