Solutions by everydaycalculation.com
79 - 49 is 13.
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Related: 14/9-4/9 7/9-8/9 7/18-4/9 7/9-4/18 21/9-4/9 7/9-12/9 7/27-4/9 7/9-4/27 35/9-4/9 7/9-20/9 7/45-4/9 7/9-4/45 49/9-4/9 7/9-28/9 7/63-4/9 7/9-4/63
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