Solutions by everydaycalculation.com
79 - 39 is 49.
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Related: 14/9-3/9 7/9-6/9 7/18-3/9 7/9-3/18 21/9-3/9 7/27-3/9 7/9-3/27 35/9-3/9 7/9-15/9 7/45-3/9 7/9-3/45 49/9-3/9 7/9-21/9 7/63-3/9 7/9-3/63
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