Solutions by everydaycalculation.com
1st number: 4 2/3, 2nd number: 5 5/7
143 - 407 is -2221.
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Related: 28/3-40/7 14/3-80/7 14/6-40/7 14/3-40/14 42/3-40/7 14/9-40/7 14/3-40/21 70/3-40/7 14/15-40/7 14/3-40/35 98/3-40/7 14/21-40/7 14/3-40/49
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