Step 1: Start with the fraction 90/40.

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

90 ÷ 40 = 2.25

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

2.25 × 100 = 225.0%

Final Answer: 90/40 as a percentage is 225.0%.