Solutions by everydaycalculation.com
89 - 69 is 29.
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Related: 16/9-6/9 8/9-12/9 8/18-6/9 8/9-6/18 24/9-6/9 8/9-18/9 8/27-6/9 8/9-6/27 40/9-6/9 8/9-30/9 8/45-6/9 8/9-6/45 56/9-6/9 8/9-42/9 8/63-6/9 8/9-6/63
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