What is the answer for 7.5+2.3y-y

(98 points) i need with 5 questions. answer definitions are welcomed, but not necessary.

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

This is so hard and it’s for a test