Step 1: Start with the fraction 402/500.

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

402 ÷ 500 = 0.804

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

0.804 × 100 = 80.4%

Final Answer: 402/500 as a percentage is 80.4%.