Solutions by everydaycalculation.com
1st number: 2 2/3, 2nd number: 18/21
83 + 1821 is 7421.
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Related: 16/3+18/21 8/3+36/21 8/6+18/21 8/3+18/42 24/3+18/21 8/3+54/21 8/9+18/21 8/3+18/63 40/3+18/21 8/3+90/21 8/15+18/21 56/3+18/21 8/21+18/21
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