Solutions by everydaycalculation.com
1st number: 6 4/6, 2nd number: 7 3/6
406 - 456 is -56.
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Related: 80/6-45/6 40/6-90/6 40/12-45/6 40/6-45/12 40/18-45/6 40/6-45/18 40/30-45/6 40/6-45/30 40/42-45/6 40/6-45/42
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