Solutions by everydaycalculation.com
1st number: 16/21, 2nd number: 4 1/5
1621 - 215 is -361105.
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Related: 32/21-21/5 16/21-42/5 16/42-21/5 16/21-21/10 48/21-21/5 16/21-63/5 16/63-21/5 16/21-21/15 80/21-21/5 16/21-21/25 16/21-21/35
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