Solutions by everydaycalculation.com
1st number: 1/2, 2nd number: 5 5/7
12 - 407 is -7314.
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Related: 1/2-80/7 1/4-40/7 1/2-40/14 3/2-40/7 1/6-40/7 1/2-40/21 5/2-40/7 1/10-40/7 1/2-40/35 7/2-40/7 1/14-40/7 1/2-40/49
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