To answer the question raised in this case we can make a rule of three, knowing that 100% of adults surveyed equals 1013. Then we have:
1013 ---------> 100%
x ----------------> 47%
Where "x" represents the number of adults corresponding to 47%.

Thus rounding we have that 476 adults think that cell phones are quite annoying.
We need to round because we are talking about people and becauseof that we must round to the nearest integer.
ANswer:
476 adults