The lengths of pregnancies in a small rural village are normally distributed with a mean of $260$ days and a standard deviation of $16$ days. A distribution of values is normal with a mean of $260$ and a standard deviation of $16.$

What percentage of pregnancies last fewer than $308$ days?

$P(x<mn\; id="EditorElement\_132673">3</mn><mn\; id="EditorElement\_132674">0</mn><mn\; id="EditorElement\_132675">8</mn>$ days $)=,\%$

Enter your answer as a percent accurate to $1$ decimal place $($do not enter the $"\%"$ sign$).$ Answers obtained using exact $z-$scores or $z-$scores rounded to $3$ decimal places are accepted.