1.8%

If  you were to personally train with me 3x a week for 1 hour, 1.8% is the percentage of your week that I am actually with you. 

Assume you sleep 7.5hrs every night... I would still only be with you 2.6% of your waking hours. 

Lets subtract the typical 40 hour workweek from your available hours... I would still only be with you about 4.0% of your waking/non-working hours.

My point here is that I take personal responsibility for my client's success even though they are outside of my control 98.2% of their week.  When it comes to fitness goals, most people cannot afford to pay their way out of making a majority of the critical choices that affect their results.  I'll do my best to leverage the 1.8% of your time I get with you, but your success/failure is ultimately your own damn fault!