Solutions by everydaycalculation.com
1st number: 3 1/2, 2nd number: 8/21
72 - 821 is 13142.
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Related: 14/2-8/21 7/2-16/21 7/4-8/21 7/2-8/42 21/2-8/21 7/2-24/21 7/6-8/21 7/2-8/63 35/2-8/21 7/2-40/21 7/10-8/21 49/2-8/21 7/2-56/21 7/14-8/21
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