1/5 is equal to the 20% of the trip and that took 45 minutes. 45minutes/20% of traveled distance = X minutes/ 100% travel distance 2.25 * 100= X 225= X So if for the 1/5 or 20% of the trip lasted 3/4hour or 45 minutes. To complete the trop you need 225 minutes or 3 hours and 45 minutes or 3 3/4 hours.
