Convert the fraction to an equivalent fraction with denominator 100, then write as a decimal.<br><br>
&bull; \( \frac{9}{20} = \frac{9 \times 5}{20 \times 5} = \frac{45}{100} \)<br>
&bull; \( \frac{45}{100} \) = 45 hundredths = 0.45<br><br>
Final Answer: 0.45