To find one-half percent of [tex]\(\$420\)[/tex], we follow these steps:
1. Understand what one-half percent means: One-half percent is equivalent to [tex]\(0.5\%\)[/tex].
2. Convert the percentage to a decimal:
[tex]\[
0.5\% = \frac{0.5}{100} = 0.005
\][/tex]
3. Multiply the amount by the decimal:
[tex]\[
420 \times 0.005
\][/tex]
4. Calculate the product:
[tex]\[
420 \times 0.005 = 2.1
\][/tex]
Therefore, one-half percent of [tex]\(\$420\)[/tex] is [tex]\(\$2.10\)[/tex].
The correct answer is:
E) [tex]\(\$2.10\)[/tex]