Step 1: Start with the fraction 71/90.

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

71 ÷ 90 = 0.7889

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

0.7889 × 100 = 78.89%

Final Answer: 71/90 as a percentage is 78.89%.