Solutions by everydaycalculation.com
79 - 69 is 19.
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Related: 14/9-6/9 7/9-12/9 7/18-6/9 7/9-6/18 21/9-6/9 7/9-18/9 7/27-6/9 7/9-6/27 35/9-6/9 7/9-30/9 7/45-6/9 7/9-6/45 49/9-6/9 7/9-42/9 7/63-6/9 7/9-6/63
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