Step 1: Start with the fraction 12/58.

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

12 ÷ 58 = 0.2069

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

0.2069 × 100 = 20.69%

Final Answer: 12/58 as a percentage is 20.69%.