I need help with this homework. I got this answer for my first question

Now the probability that a randomly selected song is between 180 to 299 second

Therefore this percentage is the sum of percentages corresponding to classes 180-239 and 240-299 i.e. 31.3% + 23.3% = 54.6%. The answer is 54.6%

for the last question need help with this

Find (180 299). State your answer as a percent rounded to 1 decimal place.