The price is 150% of what it was when you bought, but your personal gain is 50%.
If you invested $1000 at 0.06, then sold at 0.09, assuming 0 commission you'd have $1500 (50% more than you started with, so 50% gain). However your value would be 150% what it was at the start.
If it started at 0.06, and then ended at 0.06, there is no "gain" because you're at the same point, but your value is still 100%. It's just a bit of a semantic difference, is all. :)