Solutions by everydaycalculation.com
1st number: 6 2/3, 2nd number: 7 1/7
203 - 507 is -1021.
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Related: 40/3-50/7 20/6-50/7 20/3-50/14 60/3-50/7 20/9-50/7 20/3-50/21 20/15-50/7 20/3-50/35 20/21-50/7 20/3-50/49
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