Solutions by everydaycalculation.com
1st number: 1/3, 2nd number: 6 6/7
13 - 487 is -13721.
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Related: 2/3-48/7 1/3-96/7 1/6-48/7 1/3-48/14 1/9-48/7 1/3-48/21 5/3-48/7 1/15-48/7 1/3-48/35 7/3-48/7 1/21-48/7 1/3-48/49
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