a)
By looking at the circle graph, Bird was chosen by approximately 1/4 of the community.
Dog - more than 1/4
Fish, none, other and cat: less than 1/4
b)
Bird and fish
Bird ≅ 1/4 = 0.25 = 25%
Fish ≅ (1/4)/2 = 1/8 = 0.125 = 12.5%
Bird + Fish = 25 + 12.5 = 37.5 % ≅ 40%