Solutions by everydaycalculation.com
1st number: 16/21, 2nd number: 1 3/12
1621 + 1512 is 16984.
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Related: 32/21+15/12 16/21+30/12 16/42+15/12 16/21+15/24 48/21+15/12 16/21+45/12 16/63+15/12 16/21+15/36 80/21+15/12 16/21+75/12 16/21+15/60 16/21+15/84
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