Solutions by everydaycalculation.com
1st number: 2/3, 2nd number: 2 12/15
23 - 4215 is -3215.
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Related: 4/3-42/15 2/3-84/15 2/6-42/15 2/3-42/30 6/3-42/15 2/9-42/15 2/3-42/45 10/3-42/15 2/15-42/15 2/3-42/75 14/3-42/15 2/21-42/15
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