Solutions by everydaycalculation.com
1st number: 3/10, 2nd number: 5 5/7
310 - 407 is -37970.
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Related: 6/10-40/7 3/10-80/7 3/20-40/7 3/10-40/14 9/10-40/7 3/30-40/7 3/10-40/21 15/10-40/7 3/50-40/7 3/10-40/35 21/10-40/7 3/70-40/7 3/10-40/49
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