Solutions by everydaycalculation.com
1st number: 1/70, 2nd number: 2 4/7
170 - 187 is -17970.
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Related: 2/70-18/7 1/70-36/7 1/70-18/14 3/70-18/7 1/70-54/7 1/70-18/21 5/70-18/7 1/70-90/7 1/70-18/35 7/70-18/7 1/70-18/49
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