9. (3 points) Two stores, Store A and Store B, sell the same Bunny toy, originally priced at 25 yuan each. To promote sales, Store A first increases the price by 10%, then decreases it by 20%; Store B directly decreases the price by 10%. After the price adjustments, which store's price for the Bunny toy is cheaper, and by how much cheaper? $\qquad$ yuan.
【Solution】Solution: Store A:
$$
\begin{array}{l}
25 \times(1+10 \%) \times(1-20 \%), \\
=25 \times 110 \% \times 80 \%, \\
=27.5 \times 0.8, \\
=22 \text { (yuan); }
\end{array}
$$

Store B:
$$
\begin{array}{l}
25 \times(1-10 \%), \\
=25 \times 90 \%, \\
=22.5 \text { (yuan); } \\
22.5-22=0.5 \text { (yuan); }
\end{array}
$$

Answer: Store A is cheaper, cheaper by 0.5 yuan. Therefore, the answer is: A, 0.5.