Solutions by everydaycalculation.com
1st number: 2 2/3, 2nd number: 5 5/7
83 - 407 is -6421.
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Related: 16/3-40/7 8/3-80/7 8/6-40/7 8/3-40/14 24/3-40/7 8/9-40/7 8/3-40/21 40/3-40/7 8/15-40/7 8/3-40/35 56/3-40/7 8/21-40/7 8/3-40/49
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