Step 1: Start with the fraction 54/80.

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

54 ÷ 80 = 0.675

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

0.675 × 100 = 67.5%

Final Answer: 54/80 as a percentage is 67.5%.