In a city, $40 \%$ of all women are voters and $52 \%$ of the population is women. What is the percentage of the population that consists of women voters?
(a) $18.1 \%$
(b) $20.8 \%$
(c) $26.4 \%$
(d) $40 \%$
(d) $52 \%$
The fraction of women in the population is $\frac{52}{100}$, and of these, the fraction that is eligible to vote is $\frac{40}{100}$. Therefore, the fraction of women who are eligible to vote is:

$$
\frac{52}{100} \times \frac{40}{100}=\frac{104}{5 \times 100}=\frac{104}{5 \times 100} \times 100 \%=20.8 \%
$$

The correct option is (b).