TakuKun
contestada

A zoo has 15 Emperor penguins. The Emperor penguins make up 30% of all the penguins at the zoo.
How many penguins live at the zoo?

You have to find how many penguins have left.

p %
15 ------------ 30
x ------------ 100
So that mean is 30x = 1500
So the answer is x = 50
50 penguins have left the zoo.
The answer is 50