Step 1: Start with the fraction 31/45.

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

31 ÷ 45 = 0.6889

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

0.6889 × 100 = 68.89%

Final Answer: 31/45 as a percentage is 68.89%.