Solutions by everydaycalculation.com
1st number: 3 3/9, 2nd number: 4 4/9
309 - 409 is -109.
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Related: 60/9-40/9 30/9-80/9 30/18-40/9 30/9-40/18 90/9-40/9 30/27-40/9 30/9-40/27 30/45-40/9 30/9-40/45 30/63-40/9 30/9-40/63
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