Hi,

The % is a extraction relative to the value assigned for the 5th star in every level.

To try to explain it,

At Level 1 - (in the old version when we had no %'s, now internally) the 5* had a value of 20 points, and the 5* is always assigned as 80% as value now.

At L2, to achieve the 5* you need +5 points, so, 25.

If you see a 5* player, of level 2, from level 1, you will see him as 6* so 100% because 25 points at L1 is 6*-100%

And more or less this is the explanation of what you see.

Then you should know that the market adapts the player % to, the level where the player goes, so the player will change his "basic points" to be adapted to it's level taking into account that 5* is 80%".