Solutions by everydaycalculation.com
1st number: 21/28, 2nd number: 4 4/7
2128 - 327 is -10728.
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Related: 42/28-32/7 21/28-64/7 21/56-32/7 21/28-32/14 63/28-32/7 21/28-96/7 21/84-32/7 21/28-32/21 21/28-32/35 21/28-32/49
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