Solutions by everydaycalculation.com
1st number: 3/28, 2nd number: 5 5/7
328 - 407 is -15728.
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Related: 6/28-40/7 3/28-80/7 3/56-40/7 3/28-40/14 9/28-40/7 3/84-40/7 3/28-40/21 15/28-40/7 3/28-40/35 21/28-40/7 3/28-40/49
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