Need help with this Q&A 5

How can you decide witch operations to use to slice a two step equation

Write 17/20 as a decimal and as a percent.

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