A zoo has 15 Emperor penguins. The Emperor penguins make up 30% percent of all the penguins at the z

Let p be the total number penguins at the zoo.

We're told:
30% of p = 15

Since 30% = 0.3, we have:
0.3p = 15

Solve for p in the equation 0.3p = 15

Step 1: Divide each side of the equation by 0.3
0.3p/0.3 = 15/0.3
p = 50

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