According to the College Board, SAT mathematics scores from the 2015 school year for high school students in the United States were normally distributed with a mean of 511 and a standard deviation of 120.

Use a standard normal table such as this one to determine the probability that a randomly chosen high school student who took the SAT in 2015 will have a mathematics SAT score between 450 and 700 points.

Give your answer as a percentage rounded to one decimal place.

P = ... %