Step 1: Start with the fraction 45/55.

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

45 ÷ 55 = 0.8182

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

0.8182 × 100 = 81.82%

Final Answer: 45/55 as a percentage is 81.82%.