The table below shows the US Consumer Price Index for All Urban Consumers (CPI-U) for the 'Food and Beverages' category in three consecutive years.
| Period | CPI-U (Food and Beverages) |
|---|---|
| June 2021 | 275.6 |
| June 2022 | 304.3 |
| June 2023 | 321.6 |
Calculate the percentage change in this price index from June 2021 to June 2022. You are advised to show your working.