Solutions by everydaycalculation.com
89 - 39 is 59.
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Related: 16/9-3/9 8/9-6/9 8/18-3/9 8/9-3/18 24/9-3/9 8/27-3/9 8/9-3/27 40/9-3/9 8/9-15/9 8/45-3/9 8/9-3/45 56/9-3/9 8/9-21/9 8/63-3/9 8/9-3/63
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