Solutions by everydaycalculation.com
1st number: 4 1/5, 2nd number: 7 1/7
215 - 507 is -10335.
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Related: 42/5-50/7 21/10-50/7 21/5-50/14 63/5-50/7 21/15-50/7 21/5-50/21 21/25-50/7 21/5-50/35 21/35-50/7 21/5-50/49
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