Solutions by everydaycalculation.com
1st number: 6 1/4, 2nd number: 6 4/6
254 - 406 is -512.
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Related: 50/4-40/6 25/4-80/6 25/8-40/6 25/4-40/12 75/4-40/6 25/12-40/6 25/4-40/18 25/20-40/6 25/4-40/30 25/28-40/6 25/4-40/42
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