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89 - 89 is 01.
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Related: 16/9-8/9 8/9-16/9 8/18-8/9 8/9-8/18 24/9-8/9 8/9-24/9 8/27-8/9 8/9-8/27 40/9-8/9 8/9-40/9 8/45-8/9 8/9-8/45 56/9-8/9 8/9-56/9 8/63-8/9 8/9-8/63
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