Solutions by everydaycalculation.com
1st number: 4 1/5, 2nd number: 5 5/7
215 - 407 is -5335.
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Related: 42/5-40/7 21/5-80/7 21/10-40/7 21/5-40/14 63/5-40/7 21/15-40/7 21/5-40/21 21/25-40/7 21/5-40/35 21/35-40/7 21/5-40/49
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