Solutions by everydaycalculation.com
1st number: 5/21, 2nd number: 5 5/6
521 - 356 is -23542.
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Related: 10/21-35/6 5/21-70/6 5/42-35/6 5/21-35/12 15/21-35/6 5/63-35/6 5/21-35/18 25/21-35/6 5/21-35/30 35/21-35/6 5/21-35/42
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