Hi, 7 hr 45 minutes + 40 minutes = 7hr + 85 minutes = 8hr +25 minutes = 8:25 8 hr 25 minutes + 40 minutes = 8hr + 65 minutes = 9hr + 5min = 9:05 9 hr 5 minutes + 40 minutes = 9hr + 45 minutes = 9:45