Solutions by everydaycalculation.com
1st number: 28/30, 2nd number: 2 3/12
2830 - 2712 is -7960.
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Related: 56/30-27/12 28/30-54/12 28/60-27/12 28/30-27/24 84/30-27/12 28/30-81/12 28/90-27/12 28/30-27/36 28/30-27/60 28/30-27/84
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