Solutions by everydaycalculation.com
1st number: 1/3, 2nd number: 2 12/15
13 - 4215 is -3715.
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Related: 2/3-42/15 1/3-84/15 1/6-42/15 1/3-42/30 1/9-42/15 1/3-42/45 5/3-42/15 1/15-42/15 1/3-42/75 7/3-42/15 1/21-42/15
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