Solutions by everydaycalculation.com
1st number: 3/28, 2nd number: 7 1/7
328 - 507 is -19728.
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Related: 6/28-50/7 3/56-50/7 3/28-50/14 9/28-50/7 3/84-50/7 3/28-50/21 15/28-50/7 3/28-50/35 21/28-50/7 3/28-50/49
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