On Zorin OS 16.3 Lite, the denominator in the "percent battery remaining" is the designed capacity of the battery when it was new and not the capacity as it exists today.
I've refurbed a 2013 Macbook Air and it's lost battery capacity over time. The intuitive "percent battery remaining" would be using the fully charged capacity of the battery as it exists today as the denominator. It's how stock Ubuntu+Gnome calculated remaining battery when I test drove that distro on the Macbook Air.
The most important piece of data to me is the time remaining, so this isn't even really an inconvenience. Just thought it was worth mentioning 
On the whole, I test drove 3 other distros before deciding to settle on Zorin OS Lite. Very happy with it. Ubuntu+Gnome+Wayland was the best experience, but the battery life and overheating was a deal breaker. Two quirks to using Zorin OS Lite on a 2013 Macbook Air are to use Compton for X11 to fix the screen tearing and two-finger-scrolling required "sudo apt remove xserver-xorg-input-synaptics" to work with my preferred "reverse scroll direction" across all windows. Haven't figured out the webcam yet, but that's not a priority really to fix.
