Solutions by everydaycalculation.com
1st number: 2 0/3, 2nd number: 5/21
63 - 521 is 3721.
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Related: 12/3-5/21 6/3-10/21 6/3-5/42 18/3-5/21 6/3-15/21 6/9-5/21 6/3-5/63 30/3-5/21 6/3-25/21 6/15-5/21 42/3-5/21 6/3-35/21 6/21-5/21
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