Hello Piyush Athawale,
Welcome to the Tableau Community. Have you reviewed Getting Started with the Tableau Community ?
Please provide a workbook showing the data that comprises this calculation and the expected outcome. A sample Tableau Workbook (.twbx) file including some sample data will allow for the community to quickly assist.
Additional resources that may be helpful:
Here are a few references about how to mask your data if it is not able to be shared as it currently exists: