Arunner is 7/8 mile from the finsh line. she can travel 3/8 mile per minute, how long will it take her to finsh the race

Distance=rate times time
7/8=3/8 times time
times both sides by 8/3
56/24=time
28/12=time
14/6=time
7/3=time
2 and 1/3=time
answer is 2 and 1/3 minutes

24 students walk to school