Base Index revised on 1.1.2007 – 126.33

Calculation

Average CPI – Base Index – 335.33 – 126.33 = 209

Expected IDA – 209 / 126.33 x 100 =165.4%

IDA on July – 159.9%

Net increase – 5.5%

Calculation IDA w.e.f 1.10.2020.

Consumer price Index (CPI) June 2020 – 332

Consumer price Index (CPI) July 2020 – 336

Consumer price Index (CPI) August 2020 – 338

Average CPI – (332+336+338) / 3 = 335.33