Solutions by everydaycalculation.com
1st number: 1/5, 2nd number: 3 4/7
15 - 257 is -11835.
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Related: 2/5-25/7 1/5-50/7 1/10-25/7 1/5-25/14 3/5-25/7 1/5-75/7 1/15-25/7 1/5-25/21 1/25-25/7 1/5-25/35 7/5-25/7 1/35-25/7 1/5-25/49
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