Well, im not sure i can make it more simple for him, but ill try:
Normal ships (ships that are NOT premiums) get 5% free synergy. Calm down, breathe, follow my reasoning.
Now, when you make it ELITE, it gets double synergy (my english sux i know, but try to follow up).
So, lets use an illustration here to make things easy:
Lets say that BEFORE you elite the ship, it earned 100 synergy points, and an extra 5 points of free syn.
But when it is elited, instead of earning only the 100 syn points, you get 200, then, you get 10 points of free syn.
Now, lets compare:
5(the amount you gained before) x 2 = 10
Which means that you get now 10% of free syn from it when compared to when it wasnt elite, not that you will earn 10% of the double syn you get from the elite ship.
I can’t see anywhere that Elite ships give 10% synergy.
Well, i noticed first on my phobos when i was leveling it. On matches that i did like 10 kills and some assists and objectives i got 15k syn, and after the ship was elited i started to get huge amounts, about twice as much, always thought it was some bug or something made to increase the build up of locked syn on the ships so ppl would spend more GS to transform to free syn, but i guess it is working as intended.