Step 1: Start with the fraction 20/64.

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

20 ÷ 64 = 0.3125

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

0.3125 × 100 = 31.25%

Final Answer: 20/64 as a percentage is 31.25%.