Answer & Solution
The number of watches sold in Town X in April = 150
Required percentage
$$\eqalign{ & = \frac{210-150}{150}\times100 \cr & = \frac{60}{150}\times100 \cr & =40\% \cr} $$
Town X | 120 | 140 | 180 | 150 | 180 | 240 |
Town Y | 220 | 120 | 150 | 210 | 230 | 180 |