Solutions by everydaycalculation.com
1st number: 2/21, 2nd number: 7 1/7
221 - 507 is -14821.
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Related: 4/21-50/7 2/42-50/7 2/21-50/14 6/21-50/7 2/63-50/7 2/21-50/21 10/21-50/7 2/21-50/35 14/21-50/7 2/21-50/49
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