To change the fraction \( \frac{17}{50} \) to a decimal, you would:
D. Divide the numerator by the denominator.
So, you would calculate \( 17 \div 50 \).
Doing the math:
\[ 17 \div 50 = 0.34 \]
Thus, the probability of choosing a green marble can be expressed as the decimal 0.34.
To describe this probability, you might say that there is a 34% chance of selecting a green marble when you pick one marble from the bag.