Solutions by everydaycalculation.com
1st number: 21/28, 2nd number: 3 6/7
2128 - 277 is -8728.
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Related: 42/28-27/7 21/28-54/7 21/56-27/7 21/28-27/14 63/28-27/7 21/28-81/7 21/84-27/7 21/28-27/21 21/28-27/35 21/28-27/49
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