Step 1: Start with the fraction 64/91.

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

64 ÷ 91 = 0.7033

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

0.7033 × 100 = 70.33%

Final Answer: 64/91 as a percentage is 70.33%.