The increase in value was

$$
149.70-29.90=119.80 \text { reais }
$$

which corresponds to:

$$
\frac{119.80}{29.90} \times 100 \% = 400.66 \%
$$

The correct option is (d).
In 1972, filling the tank of a small car cost $R \$ 29.90$, and in 1992, it cost $\$ 149.70$ to fill the same tank. Which of the following values best approximates the percentage increase in the price of gasoline over this 20-year period?
(a) $20 \%$
(b) $125 \%$
(d) $300 \%$
(d) $400 \%$
(e) $500 \%$