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The Consumer Price Index (CPI)

AP.MACRO: MEA‑1 (EU), MEA‑1.F (LO), MEA‑1.F.1 (EK), MEA‑1.F.2 (EK), MEA‑1.F.3 (EK), MEA‑1.F.4 (EK), MEA‑1.G (LO), MEA‑1.G.1 (EK)
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Problem

The country of Ambrosia calculates inflation using a consumer price index (CPI). Between 2016 and 2017 the CPI increased from 200 to 220.
What was the inflation rate between 2016 and 2017?
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