The LCM of 9 and 12 is 36.
I hope this helps, and have a good night and life! :D
Answer:

Step-by-step explanation:
we have

Remember that


in this problem we have

Convert
to minutes

so

Convert
to seconds

therefore

50% because there are 4 routes and 2 take 30 minutes, 2/4 = 50/100 = 50%