Solutions by everydaycalculation.com
1st number: 1/3, 2nd number: 5 5/7
13 - 407 is -11321.
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Related: 2/3-40/7 1/3-80/7 1/6-40/7 1/3-40/14 1/9-40/7 1/3-40/21 5/3-40/7 1/15-40/7 1/3-40/35 7/3-40/7 1/21-40/7 1/3-40/49
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