Step 1: Start with the fraction 55/80.

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

55 ÷ 80 = 0.6875

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

0.6875 × 100 = 68.75%

Final Answer: 55/80 as a percentage is 68.75%.