Solutions by everydaycalculation.com
1st number: 14/28, 2nd number: 1 2/12
1428 - 1412 is -23.
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Related: 14/28-28/12 14/56-14/12 14/28-14/24 42/28-14/12 14/28-42/12 14/84-14/12 14/28-14/36 70/28-14/12 14/28-70/12 14/28-14/60 98/28-14/12 14/28-98/12 14/28-14/84
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