Certainly, let's simplify it further:
If there are 18 sea lions and for every 6 sea lions there are 5 turtles, you can calculate it like this:
1. Divide the number of sea lions (18) by the group size (6) to find out how many groups there are:
\(18 \div 6 = 3\)
2. Now, for each group of 6 sea lions, there are 5 turtles. So, multiply the number of groups by 5 to find the total number of turtles:
\(3 groups \times 5 turtles per group = 15 turtles\)
So, there are 15 turtles if there are 18 sea lions at the zoo.