Solutions by everydaycalculation.com
1st number: 16/21, 2nd number: 2 11/12
1621 - 3512 is -18184.
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Related: 32/21-35/12 16/21-70/12 16/42-35/12 16/21-35/24 48/21-35/12 16/63-35/12 16/21-35/36 80/21-35/12 16/21-35/60 16/21-35/84
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