(Solved): Calculate the annual inflation rate between 30th June 1978 when the consumer price index (CPI) was ...

Calculate the annual inflation rate between 30th June 1978 when the consumer price index (CPI) was 21.7 and 30th June 1988 when the CPI was 49.3. Note that you should find the annual CPI inflation rate between these dates. Select one: a. $$7.0777\%\mathrm{pa}$$ b. $$8.5522\%$$ pa c. $$9.5465\%\mathrm{pa}$$ d. $$10.8022\%\mathrm{pa}$$ e. $$27.6\%$$ pa