Solutions by everydaycalculation.com
1st number: 8/15, 2nd number: 2 12/15
815 - 4215 is -3415.
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Related: 16/15-42/15 8/15-84/15 8/30-42/15 8/15-42/30 24/15-42/15 8/45-42/15 8/15-42/45 40/15-42/15 8/75-42/15 8/15-42/75 56/15-42/15
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