Solutions by everydaycalculation.com
1st number: 1 3/9, 2nd number: 8/12
129 - 812 is 23.
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Related: 24/9-8/12 12/9-16/12 12/18-8/12 12/9-8/24 36/9-8/12 12/9-24/12 12/27-8/12 12/9-8/36 60/9-8/12 12/9-40/12 12/45-8/12 12/9-8/60 84/9-8/12 12/9-56/12 12/63-8/12 12/9-8/84
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