Solutions by everydaycalculation.com
1st number: 16/21, 2nd number: 3 5/9
1621 - 329 is -17663.
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Related: 32/21-32/9 16/21-64/9 16/42-32/9 16/21-32/18 48/21-32/9 16/21-96/9 16/63-32/9 16/21-32/27 80/21-32/9 16/21-32/45 16/21-32/63
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