Solutions by everydaycalculation.com
1st number: 1 3/9, 2nd number: 4/12
129 - 412 is 11.
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Related: 24/9-4/12 12/9-8/12 12/18-4/12 12/9-4/24 36/9-4/12 12/27-4/12 12/9-4/36 60/9-4/12 12/9-20/12 12/45-4/12 12/9-4/60 84/9-4/12 12/9-28/12 12/63-4/12 12/9-4/84
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