Solutions by everydaycalculation.com
1st number: 16/21, 2nd number: 3 4/7
1621 - 257 is -5921.
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Related: 32/21-25/7 16/21-50/7 16/42-25/7 16/21-25/14 48/21-25/7 16/21-75/7 16/63-25/7 16/21-25/21 80/21-25/7 16/21-25/35 16/21-25/49
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