conversations.from: human
conversations.value: Please show me the solution for: A survey conducted by the school showed that only 20% of the 800 parents agree to a tuition fee increase. How many parents disagree with the tuition fee increase?
conversations.from: assistant
conversations.value: There were 800 x 20/100 = 160 parents who agreed to the tuition fee increase.
  So, there were 800 - 160 = 640 parents who disagreed.