Solutions by everydaycalculation.com
1st number: 8 0/3, 2nd number: 5/21
243 - 521 is 16321.
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Related: 48/3-5/21 24/3-10/21 24/6-5/21 24/3-5/42 72/3-5/21 24/3-15/21 24/9-5/21 24/3-5/63 24/3-25/21 24/15-5/21 24/3-35/21 24/21-5/21
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