Solutions by everydaycalculation.com
1st number: 15/21, 2nd number: 3 8/9
1521 - 359 is -20063.
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Related: 30/21-35/9 15/21-70/9 15/42-35/9 15/21-35/18 45/21-35/9 15/63-35/9 15/21-35/27 75/21-35/9 15/21-35/45 15/21-35/63
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