Final answer:
To convert 4/21 to a decimal rounded to the nearest tenth, divide 4 by 21. The answer is approximately 0.2.
Step-by-step explanation:
To convert a fraction to a decimal, we divide the numerator by the denominator. In this case, 4 divided by 21 gives us approximately 0.19047619. Rounding it to the nearest tenth, we get 0.2.