Solve for y?

 3 3/5 + y + 5 2/3 = 15

First change them to improper fractions

3 3/5 + y + 5 2/3 = 15

3 3/5 = 18/5

5 2/3 = 17/3

now find the common denominator which would be  3 × 5 = 15

18/5 =  54/15

17/3 =  85/15

now add

(54 + 85) = 139/15

now divide

139 ÷ 15 = 9 4/15

now we need to find the missing factor

15 is our total, so now we have to subtract

15 - 9 4/15

change to improper fractions

15/1 − 139/15=

((15 × 15) − (139 × 1)) / (1 × 15) =

 (225 - 139) / 15=

86/15

now divide

86 ÷ 15 = 5 11/15

Your answer is B.  5 11/15

Hope this helps. :)

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