Solutions by everydaycalculation.com
1st number: 6/40, 2nd number: 1 23/40
640 - 6340 is -5740.
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Related: 12/40-63/40 6/80-63/40 6/40-63/80 18/40-63/40 30/40-63/40 42/40-63/40
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