Solutions by everydaycalculation.com
1st number: 3 3/9, 2nd number: 2 3/9
309 - 219 is 11.
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Related: 60/9-21/9 30/9-42/9 30/18-21/9 30/9-21/18 90/9-21/9 30/9-63/9 30/27-21/9 30/9-21/27 30/45-21/9 30/9-21/45 30/63-21/9 30/9-21/63
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