The ratio to convert hours to minutes is 60 minutes to 1 hour, or 1 hour to 60 minutes.

To convert 2.4 hours into minutes, you would use the ratio of 60 minutes to 1 hour. This means that for every 1 hour, there are 60 minutes.

Therefore, to convert 2.4 hours into minutes, you would multiply 2.4 hours by 60 minutes per hour.

2.4 hours * 60 minutes/hour = 144 minutes

So, 2.4 hours is equal to 144 minutes.