Solutions by everydaycalculation.com
1st number: 1/28, 2nd number: 7 1/7
128 - 507 is -19928.
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Related: 2/28-50/7 1/56-50/7 1/28-50/14 3/28-50/7 1/84-50/7 1/28-50/21 5/28-50/7 1/28-50/35 7/28-50/7 1/28-50/49
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