Solutions by everydaycalculation.com
1st number: 21/28, 2nd number: 1 2/14
2128 - 1614 is -1128.
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Related: 42/28-16/14 21/28-32/14 21/56-16/14 21/28-16/28 63/28-16/14 21/28-48/14 21/84-16/14 21/28-16/42 21/28-80/14 21/28-16/70 21/28-16/98
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