Step 1: Start with the fraction 18/100.

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

18 ÷ 100 = 0.18

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

0.18 × 100 = 18.0%

Final Answer: 18/100 as a percentage is 18.0%.