Clovis wants to make a surprise visit to his uncle who lives out of town. he purchases an airline ticket for $69. there is a 15% sales tax on the price of the airline ticket. in addition he must pay a baggage fee of $20. when he arrives at the airport, clovis takes a taxi to his uncle's house which is 8 miles from the airport. the taxi is 2.50 per mile. if clovis has spent a total of 123.35 for the airline ticket and taxi ,at what percent of his fare did clovis tip the taxi driver?