Solutions by everydaycalculation.com
1st number: 2 1/10, 2nd number: 12 4/5
2110 - 645 is -10710.
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Related: 42/10-64/5 21/20-64/5 21/10-64/10 63/10-64/5 21/30-64/5 21/10-64/15 21/50-64/5 21/10-64/25 21/70-64/5 21/10-64/35
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