Solutions by everydaycalculation.com
1st number: 2 2/3, 2nd number: 12/21
83 + 1221 is 6821.
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Related: 16/3+12/21 8/3+24/21 8/6+12/21 8/3+12/42 24/3+12/21 8/3+36/21 8/9+12/21 8/3+12/63 40/3+12/21 8/3+60/21 8/15+12/21 56/3+12/21 8/3+84/21 8/21+12/21
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