All-India Consumer Price Index for Industrial workers (2016=100) for May,2021 increased to 120.6 points compared to 120.1 points for April 2021.
If we convert that to 2001=100 series, it comes to 347 points. Therefore we are entitled to 173.6% IDA from July 2021.
That is an increase of 13.7% on present IDA 159.9%.