Solutions by everydaycalculation.com
1st number: 8/30, 2nd number: 3 9/12
830 - 4512 is -20960.
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Related: 16/30-45/12 8/30-90/12 8/60-45/12 8/30-45/24 24/30-45/12 8/90-45/12 8/30-45/36 40/30-45/12 8/30-45/60 56/30-45/12 8/30-45/84
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