Solutions by everydaycalculation.com
1st number: 10/21, 2nd number: 2 12/15
1021 - 4215 is -244105.
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Related: 20/21-42/15 10/21-84/15 10/42-42/15 10/21-42/30 30/21-42/15 10/63-42/15 10/21-42/45 50/21-42/15 10/21-42/75 70/21-42/15
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