Solutions by everydaycalculation.com
1st number: 18/24, 2nd number: 1 3/12
1824 + 1512 is 21.
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Related: 36/24+15/12 18/24+30/12 18/48+15/12 18/24+15/24 54/24+15/12 18/24+45/12 18/72+15/12 18/24+15/36 90/24+15/12 18/24+75/12 18/24+15/60 18/24+15/84
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