Solutions by everydaycalculation.com
1st number: 1/3, 2nd number: 1 3/21
13 - 2421 is -1721.
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Related: 2/3-24/21 1/3-48/21 1/6-24/21 1/3-24/42 1/3-72/21 1/9-24/21 1/3-24/63 5/3-24/21 1/15-24/21 7/3-24/21 1/21-24/21
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