EXPLANATION
Assumming that B represent the probability of see a Butterfly and that T represent the probability of see a Turtle, we can apply the following reasonings:
P(B) = 0.8
P(T) = 0.4
As both events are independent, we can apply the following relationships:
P(B∩T) = P(B).P(T) = 0.8*0.4 = 0.32
Hence, the probability for both events is 32%