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?
Thoughts? Step-by-step reasoning:
The ticket price increase is $102 - $85 = $17. So there is 17 / 85 x 100% = 20% increase of price.
Thus, the answer is 20.