Solutions by everydaycalculation.com
1st number: 6/12, 2nd number: 1 3/9
612 - 129 is -56.
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Related: 6/12-24/9 6/24-12/9 6/12-12/18 18/12-12/9 6/12-36/9 6/36-12/9 6/12-12/27 30/12-12/9 6/12-60/9 6/60-12/9 6/12-12/45 42/12-12/9 6/12-84/9 6/84-12/9 6/12-12/63
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