Solutions by everydaycalculation.com
1st number: 1 2/3, 2nd number: 5/15
53 + 515 is 21.
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Related: 10/3+5/15 5/3+10/15 5/6+5/15 5/3+5/30 15/3+5/15 5/9+5/15 5/3+5/45 25/3+5/15 5/3+25/15 5/15+5/15 5/3+5/75 35/3+5/15 5/3+35/15 5/21+5/15
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