Solutions by everydaycalculation.com
1st number: 2/10, 2nd number: 6 4/10
210 - 6410 is -315.
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Related: 4/10-64/10 2/20-64/10 2/10-64/20 6/10-64/10 2/30-64/10 2/10-64/30 2/50-64/10 2/10-64/50 14/10-64/10 2/70-64/10 2/10-64/70
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