Solutions by everydaycalculation.com
1st number: 3 0/9, 2nd number: 3 3/9
279 - 309 is -13.
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Related: 54/9-30/9 27/9-60/9 27/18-30/9 27/9-30/18 81/9-30/9 27/9-90/9 27/9-30/27 27/45-30/9 27/9-30/45 27/63-30/9 27/9-30/63
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