Step 1: Start with the fraction 20/90.

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

20 ÷ 90 = 0.2222

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

0.2222 × 100 = 22.22%

Final Answer: 20/90 as a percentage is 22.22%.