"15 minutes could save me 15% or more" means it could only save you 10% or even 0%. The word "could" is very important.
Half price then 50% off isn't free, it's a quarter of the original price.
It makes sense.
I know, but it follows completely different logic than the joke is going for. That's one of like two emoticons on this site I know, so I went for it.
It doesn't follow different logic. I was just stating that percentages can't simply be added together.
I know. You were following actual logic, the joke wasn't.
Jokes based in reality are better :/
Lol it's exactly the same idea. If they then took another 15% off after another 15 mins it would be at 27.75% off, not 30% off. After yet another 15 mins it would be at 38.5875% off, not 45% off.
It would never reach 100% off, just keep getting smaller.
(Sorry I need a life, I'l go sulk now)
Wow great math!