Solutions by everydaycalculation.com
1st number: 4 4/9, 2nd number: 5 5/7
409 - 407 is -8063.
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Related: 80/9-40/7 40/9-80/7 40/18-40/7 40/9-40/14 40/27-40/7 40/9-40/21 40/45-40/7 40/9-40/35 40/63-40/7 40/9-40/49
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