A fraction \(\frac{a}{b}\) means a ÷ b. Convert to a decimal.

• Simplify: \(\frac{18}{40} = \frac{9}{20}\)
• Convert \(\frac{9}{20}\) to denominator 100: multiply by \(\frac{5}{5}\)
• \(\frac{9 \times 5}{20 \times 5} = \frac{45}{100}\)
• \(\frac{45}{100} = 0.45\)

Final Answer: 0.45