I need help ASAP pls

At least two people have the same birthday in a school of 150 students

It takes jonas 7 1/4 minutes to run the mile. it takes mario 8 5/12 to run the mile. how much faster is jonas than mario? 5/6 minute 1 1/3 minutes 1 1/6 minutes 1 1/2 minutesi will give points and brainlest

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much