Flanking Bonuses?

When a unit like the Hussar has an increased flanking bonus (15 instead of 10), what does this imply?

For example, if you had a Hussar and a warrior surrounding one enemy unit, how much flanking combat bonus would the warrior receive when attacking, and how much would the Hussar receive? Would both units receive the 25% (15% + 10%)?

AFAIK, the Hussar gets 15%, the warrior gets 10%. If there is another unit, I believe that the Hussar would be getting 30%, while the other two units got 20%.

Is that a guess?

He's right (at least if its the same promotion as a Kris gets)

Flanking bonus= 10% * (number of enemies surrounding the target unit-1)

[might be different for range not sure]