Solutions by everydaycalculation.com
1st number: 12/21, 2nd number: 3 9/21
1221 - 7221 is -207.
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Related: 24/21-72/21 12/42-72/21 12/21-72/42 36/21-72/21 12/63-72/21 12/21-72/63 60/21-72/21 84/21-72/21
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