To find the percentage of zebras at the zoo, you can use the formula:
\[ \text{Percentage} = \left( \frac{\text{Number of Zebras}}{\text{Total Number of Animals}} \right) \times 100 \]
Substituting the given values:
\[ \text{Percentage} = \left( \frac{4}{80} \right) \times 100 \]
Calculating the fraction:
\[ \frac{4}{80} = 0.05 \]
Now, multiply by 100 to convert to a percentage:
\[ 0.05 \times 100 = 5% \]
Therefore, the percentage of zebras at the zoo is 5%.