The table below shows the Consumer Price Index (CPI) for a European economy in June for three consecutive years.
| Period | Consumer Price Index (CPI) |
|---|---|
| June 2021 | 110.8 |
| June 2022 | 120.3 |
| June 2023 | 128.6 |
Calculate the annual rate of inflation (percentage change in the CPI) from June 2021 to June 2022. You are advised to show your working.