Indian Economy / Price Indices and Inflation
Inflation is a progressive rise in general level of prices leading to fall in the purchasing power of the money. In other words, it means too much money chasing too few goods. Inflation is also considered as one of the macro-economic aggregates.
To monitor the price rise, point to point comparison (in comparison with corresponding month of previous year) is used. 12 month average will be
taken for calculating annual inflation rate.
For example, let Consumer Price Index (Combined) value for January, 2015 be 249.0 and for January, 2016 be 285.5, the inflation rate will be (285.5 - 249.0)/ 249.0 = 14.66%
It is a measure of the long term inflation movement. It excludes relatively volatile commodities. It captures the real inflation in the economy. This is being calculated by RBI.