Answer:
126.14
Explanation:
Assume Consumer Price Index (CPI) for 2015 to be X
With 2016 CPI at 138.75, and a 10% inflation rate, the relationship showing the growth from 2015 to 2016
= CPI.2015 * (1 + growth rate) = CPI.2016
= CPI.2015 * 1.10 = 138.75
= CPI.2015 = 138.75/1.1
= CPI.2015 = 126.14.
Therefore, 2015 Consumer Price Index = 126.14.
