Step 1: Start with the fraction 16/21.

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

16 ÷ 21 = 0.7619

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

0.7619 × 100 = 76.19%

Final Answer: 16/21 as a percentage is 76.19%.