Answer:
Number of new Tigers = 27
Step-by-step explanation:
In order to find the solution, you first need to consider the amount of all of the mentioned animals, and use them to find the remaining number.
First, divide 216 by 4 in order to find the number of giraffes, since one fourth of the animals are giraffes. You should get 54.
Next, find the number of lions by dividing 216 by 2, since half of the mentioned animals are lions. You should get 108.
This leaves 54, meaning that there are 54 tigers at the zoo.
In order to find the amount of new tigers, you need to divide 54 by 2.
You should get 27, and that is both the answer and the conclusion of the problem.