Solutions by everydaycalculation.com
1st number: 4 2/3, 2nd number: 15/21
143 + 1521 is 11321.
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Related: 28/3+15/21 14/3+30/21 14/6+15/21 14/3+15/42 42/3+15/21 14/3+45/21 14/9+15/21 14/3+15/63 70/3+15/21 14/3+75/21 14/15+15/21 98/3+15/21 14/21+15/21
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