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?
How many parents rated Excellent or Very Satisfactory? ** The total percentage of those who rated Excellent or Very Satisfactory is 15% + 60% = 75%.
How many parents rated Excellent or Very Satisfary? ** Seventy-five percent of the parents is 120 x 75/100 = <<120*75/100=90>>90.
How many students rated Needs Improvement? ** Hence, 120 - 90 = <<120-90=30>>30 students rated either Satisfactory or Needs Improvement.
How many parents rated Satisfactory? ** A total of 30 x 80/100 = <<30*80/100=24>>24 parents rated Satisfactory.
How many parents rated Needs Improvement? ** Therefore, 30 - 24 = <<30-24=6>>6 parents rated Needs Improvement.
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