Solutions by everydaycalculation.com
1st number: 21/70, 2nd number: 1 2/14
2170 - 1614 is -5970.
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Related: 42/70-16/14 21/70-32/14 21/70-16/28 63/70-16/14 21/70-48/14 21/70-16/42 21/70-80/14 21/70-16/70 21/70-16/98
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