Solutions by everydaycalculation.com
1st number: 1 2/12, 2nd number: 14/21
1412 - 1421 is 12.
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Related: 28/12-14/21 14/12-28/21 14/24-14/21 14/12-14/42 42/12-14/21 14/12-42/21 14/36-14/21 14/12-14/63 70/12-14/21 14/12-70/21 14/60-14/21 98/12-14/21 14/12-98/21 14/84-14/21
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