What does 10% brake Life Look Like When Warned by a Mechanic

Back when I was new to riding I
took my bike to the local dealership for a tire change and was told by the service mechanic that I only had 10% life left on my rear pads.

What the hell does 10% life mean and what does that look like I thought to myself. More importantly, what time frame do I have left? Does that mean I have months, weeks or days left of riding before I need to change them? 

Well, being new to riding and having no experience wrenching on my own bike just yet I had no idea that the mechanic couldn't tell me off the bat because this is all dependent on many factors. Your riding style for one and how often you use the rear break vs. the front. The traffic conditions you ride in, wide open road vs. heavy stop and go conditions and the frequency of use of the bike. I'm not sure about you all but I use my bike as a daily commuter verses taking a car to work and being stuck in heavy LA traffic for two hours playing the head bobbing game. Other riders have the misfortune of only being able to ride on the weekends which extends the wear life, but sucks for them as they miss out on the daily enjoyment of riding.

At any rate in this video I show you what 10% of remaining brake life looks like and how much ride time can be done after you get the 10% warning from your mechanic.

What does 10% brake Life Look Like When Warned by a Mechanic