Solutions by everydaycalculation.com
1st number: 1/21, 2nd number: 1 2/12
121 - 1412 is -4742.
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Related: 2/21-14/12 1/21-28/12 1/42-14/12 1/21-14/24 3/21-14/12 1/21-42/12 1/63-14/12 1/21-14/36 5/21-14/12 1/21-70/12 1/21-14/60 7/21-14/12 1/21-98/12 1/21-14/84
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