Step 1: Start with the fraction 77/90.

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

77 ÷ 90 = 0.8556

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

0.8556 × 100 = 85.56%

Final Answer: 77/90 as a percentage is 85.56%.