Solutions by everydaycalculation.com
1st number: 2 0/3, 2nd number: 8/15
63 + 815 is 3815.
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Related: 12/3+8/15 6/3+16/15 6/3+8/30 18/3+8/15 6/3+24/15 6/9+8/15 6/3+8/45 30/3+8/15 6/3+40/15 6/15+8/15 6/3+8/75 42/3+8/15 6/3+56/15 6/21+8/15
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