Solutions by everydaycalculation.com
1st number: 1 3/12, 2nd number: 8/21
1512 + 821 is 13784.
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Related: 30/12+8/21 15/12+16/21 15/24+8/21 15/12+8/42 45/12+8/21 15/12+24/21 15/36+8/21 15/12+8/63 75/12+8/21 15/12+40/21 15/60+8/21 15/12+56/21 15/84+8/21
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