Solutions by everydaycalculation.com
1st number: 1/3, 2nd number: 1 6/21
13 - 2721 is -2021.
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Related: 2/3-27/21 1/3-54/21 1/6-27/21 1/3-27/42 1/3-81/21 1/9-27/21 1/3-27/63 5/3-27/21 1/15-27/21 7/3-27/21 1/21-27/21
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