Dax for percentage

[Gauss38]

Dax formula to calculate a percentage. Hello I have a table with the number of pieces sold according to the department I want a formula which allows me to calculate the percentage of number of pieces that must be sold online which is 7% for a department and 10% for a other department so that I can calculate with the actual sales online

[stevedep]

https://community.powerbi.com/t5/Community-Blog/How-to-Get-Your-Question-Answered-Quickly/ba-p/38490