conversations.from: human
conversations.value: I need a clearer understanding of how to solve: A survey was conducted by a school to the parents about their children's online class experience. Fifteen percent of the respondents rated Excellent; 60% rated Very Satisfactory; 80% of the remaining respondents rated Satisfactory and the rest rated Needs Improvement. If 120 parents answered the survey, how many of them rated Needs Improvement?
conversations.from: assistant
conversations.value: The total percentage of those who rated Excellent or Very Satisfactory is 15% + 60% = 75%.
  Seventy-five percent of the parents is 120 x 75/100 = 90.
  Hence, 120 - 90 = 30 students rated either Satisfactory or Needs Improvement.
  A total of 30 x 80/100 = 24 parents rated Satisfactory.
  Therefore, 30 - 24 = 6 parents rated Needs Improvement.