Solutions by everydaycalculation.com
1st number: 2/21, 2nd number: 1 14/21
221 - 3521 is -117.
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Related: 4/21-35/21 2/21-70/21 2/42-35/21 2/21-35/42 6/21-35/21 2/63-35/21 2/21-35/63 10/21-35/21 14/21-35/21
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