0
Anonymous
11/15
Because 2/5=6/15 and 1/3=5/15.
To add fractions you need a common denominator and then you add the numerators and make their sum the new numerator over the common denomerator.
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1
1/3 + 2/5 = 5/15 + 6/15 = 11/15 (Eleven fifteenths)
17/30
2/5 + 4/5 = 6/5 or 1 1/5
2/5 + 1/5 = 3/5