Solutions by everydaycalculation.com
1st number: 6/70, 2nd number: 2 1/10
670 - 2110 is -14170.
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Related: 12/70-21/10 6/70-42/10 6/70-21/20 18/70-21/10 6/70-63/10 6/70-21/30 30/70-21/10 6/70-21/50 42/70-21/10 6/70-21/70
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