Note: I will be using the information in your attachment to answer the question. Add the minutes to the initial time: 7:00 + 10 minutes + 7 minutes + 5 minutes = 7:22 He will be ready to board the bus at 7:22. Subtract this time from the time the bus is schedule to pick him up: 7:40 - 7:22 = 18 Max will have 18 minutes before the bus picks him up.