Solutions by everydaycalculation.com
1st number: 12/15, 2nd number: 4 3/15
1215 + 6315 is 51.
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Related: 24/15+63/15 12/30+63/15 12/15+63/30 36/15+63/15 12/45+63/15 12/15+63/45 60/15+63/15 12/75+63/15 12/15+63/75 84/15+63/15
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