Solutions by everydaycalculation.com
1st number: 2 0/9, 2nd number: 10 0/9
189 - 909 is -81.
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Related: 36/9-90/9 18/9-90/18 54/9-90/9 18/27-90/9 18/9-90/27 90/9-90/9 18/45-90/9 18/9-90/45 18/63-90/9 18/9-90/63
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