Alright! In order to find the answer you'd first write a fraction. The total number of snakes over the amount of snakes that are not venomous. To find which snakes are not venomous you'd subtract 600 from 2700:
[2700 - 600 = 2100].
So, the the fraction of snakes that are not venomous is 2100/2700. and simplified is 4/9.
4/9ths is approximately .77 in decimal form.