Solutions by everydaycalculation.com
1st number: 3/12, 2nd number: 16 2/3
312 - 503 is -19712.
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Related: 6/12-50/3 3/24-50/3 3/12-50/6 9/12-50/3 3/36-50/3 3/12-50/9 15/12-50/3 3/60-50/3 3/12-50/15 21/12-50/3 3/84-50/3 3/12-50/21
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