Step 1: Start with the fraction 9/45.

Step 2: To convert a fraction into a percentage, divide the numerator by the denominator.

9 ÷ 45 = 0.2

Step 3: Multiply the result by 100 to get the percentage.

0.2 × 100 = 20.0%

Final Answer: 9/45 as a percentage is 20.0%.