I was wondering if Race/personality bonus and building effects bonus % are additive or multiplicative.

For example, an avian warrior has a bonus of +30%br and warriors +15% Off Military Efficiency. So if i ran 10% homes with the effect of +30% br and 10%tg with effects of +15% higher offensive efficiency, is that gonna give me a total of +60%br and 30%ome when in war?

I feel like that cant be the case. Seems too high.