<human>:  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?
<bot>: How much did the ticket price increase? ** The ticket price increase is $102 - $85 = $<<102-85=17>>17
What is the percent increase in the cost of each ticket? ** So there is 17/85 x 100% = 20% increase of price.
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