Solutions by everydaycalculation.com
1st number: 1/21, 2nd number: 6 0/7
121 - 427 is -12521.
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Related: 2/21-42/7 1/21-84/7 1/42-42/7 1/21-42/14 3/21-42/7 1/63-42/7 1/21-42/21 5/21-42/7 1/21-42/35 7/21-42/7 1/21-42/49
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