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 fee 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?

The percent that Clovis gave to the taxi driver as the tip is 16.7%. Let's calculate how much Clovis gave for the airline ticket without the taxi tip. Airline ticket: $69.00. Airline ticket sales tax: $10.35 (If $69 is 100%, sales tax (x) is 15%. $69 : 100% = x : 15%. x = $69 * 15% : 100% = $10.35). Baggage fee: $20.00. The total amount without the taxi is $69.00 + $10.35 + $20.00 = $99.35. The value of the taxi fare and the tip is: $123.35 - $99.35 = $24.00. Taxi fee: $20.00 ($2.50 per 1 mile, x per 8 miles. $2.50 : 1 mile = x : 8 miles. x = $2.50 * 8 miles : 1 mile = $20.00). The value of the tip is: $24.00 - $20.00 = $4.00. Now, find the percent of this value. If $24.00 is 100%, $4.00 is x. $24.00 : 100% = $4.00 : x. x = $4.00 * 100% : $24.00. x = 16.7%.

The expressions would be 0.25a