Checked the web application to see the cause of the error for the total percentage, the error is the total return of 100.0001 but it should be 100% only. As per checking, the cause of the error is the rounding off in computing the total percentage. Modified the web application to fix the computation, tested the modified web application, as per checking, it is now OK. Tested different scenarios, when checked multiple months, the total percentage returned 99.59%, modified the web application again to fix this, applied different round off function (floatval) and tested it again, as per testing, it is now OK. 