Solutions by everydaycalculation.com
1st number: 1 14/21, 2nd number: 1 2/7
3521 - 97 is 821.
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Related: 70/21-9/7 35/21-18/7 35/42-9/7 35/21-9/14 35/21-27/7 35/63-9/7 35/21-9/21 35/21-45/7 35/21-9/35 35/21-63/7 35/21-9/49
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