conversations.from: human
conversations.value: Elsa and her sister watch an opera show every year at Central City Opera. Last year, opera seating cost $85 per ticket. This year, it costs $102. What is the percent increase in the cost of each ticket?
  Give me a clear explanation.
conversations.from: assistant
conversations.value: The ticket price increase is $102 - $85 = $17
  So there is 17/85 x 100% = 20% increase of price.