Solutions by everydaycalculation.com
1st number: 5 1/3, 2nd number: 7 1/7
163 - 507 is -3821.
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Related: 32/3-50/7 16/6-50/7 16/3-50/14 48/3-50/7 16/9-50/7 16/3-50/21 80/3-50/7 16/15-50/7 16/3-50/35 16/21-50/7 16/3-50/49
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