A proportion is an equation that states that two ratios are equal.
To evaluate both options:
Option 1: \[ \frac{4}{5} = \frac{20}{25} \]
Now we simplify \( \frac{20}{25} \): \[ \frac{20 \div 5}{25 \div 5} = \frac{4}{5} \]
Since both sides equal \( \frac{4}{5} \), Option 1 is a proportion.
Option 2: \[ \frac{4}{5} = \frac{16}{30} \]
Now we simplify \( \frac{16}{30} \): \[ \frac{16 \div 2}{30 \div 2} = \frac{8}{15} \]
Since \( \frac{4}{5} \) does not equal \( \frac{8}{15} \), Option 2 is not a proportion.
Thus, the correct answer is Option 1: \( \frac{4}{5} = \frac{20}{25} \) is a proportion.