Solutions by everydaycalculation.com
1st number: 2/21, 2nd number: 3 0/7
221 - 217 is -6121.
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Related: 4/21-21/7 2/21-42/7 2/42-21/7 2/21-21/14 6/21-21/7 2/21-63/7 2/63-21/7 10/21-21/7 2/21-21/35 14/21-21/7 2/21-21/49
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