Hello Maria,
There are a couple things we can do.
#1. We can set up a Style on that column in the List View to show as a percentage. See the following Documentation.
http://help.k2.com/onlinehelp/K2Cloud/UserGuide/Update_7/default.htm#Create/K2Designer/Styles/Styles.htm#2. We can use an expression to multiply by .1 on the List View Column to return a percentage.
These are probably the easiest ways to accomplish this.
Good Day MariaDmitrieva
By the looks of your requirement it seems that you want to know how to add another expresison into the ExpectedTotal% column which should calculate the total percentage that each rows RowTotal has over the Total Sum.
To do that you can simply call the existing RowTotal expession inside of the ExpectedTotal%'s expression. See the configuration steps in the following screenshot.
Note: After adding the expressions as per above you notice tha the ExpectedTotal% will be in a decimal value therefore you will need to set the Percentage styling onto the ExpectedTotal% column to display the decimal as percentage. See image below on how to set the decimal value to percentage.
Result Preview:
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Kind Regards
Raymond