So for fractional attack and save bonuses:
BAB; (Barb = 2×1=2)+(Ranger=.75×3=2.5)=4.5 rounded to 4
Fort; (Barb=Good, 2×1=2)+(Ranger=Good,1×3=3)=5,
Refl;(Barb=poor,0.33×2=0.66)+(Ranger=Good,1×2=2)=2.66 rounded to 2,
Will;(Barb=poor,0.33×2=0.66)+(Ranger=poor,0.33×3=1) = 1.66 rounded to 1.
[OoC: is my math right?]
BAB; (Barb = 2×1=2)+(Ranger=.75×3=2.5)=4.5 rounded to 4
Fort; (Barb=Good, 2×1=2)+(Ranger=Good,1×3=3)=5,
Refl;(Barb=poor,0.33×2=0.66)+(Ranger=Good,1×2=2)=2.66 rounded to 2,
Will;(Barb=poor,0.33×2=0.66)+(Ranger=poor,0.33×3=1) = 1.66 rounded to 1.
[OoC: is my math right?]