Solutions by everydaycalculation.com
1st number: 4 4/9, 2nd number: 10 0/9
409 - 909 is -509.
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Related: 80/9-90/9 40/18-90/9 40/9-90/18 40/27-90/9 40/9-90/27 40/45-90/9 40/9-90/45 40/63-90/9 40/9-90/63
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