Answer :

irspow
Adding/subtracting fractions requires that they have the same common denominator.  In this case they already have 8 in both denominators. Once they have a common denominator addition/subtraction can be carried out as follows:

rule:  a/c+b/c=(a+b)/c...  in this case

3/8+2/8

(3+2)/8

5/8

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