hi , in need to create calulated fields and use them in the expression of another field insted of writing the whole expressions for every change i make in basic field form witch i calculate for example : textbox21 -> ((CountDistinct(IIf(Fields!activitycount.Value<>0,Fields!new_actionitemid.Value, Nothing)) textbox23 -> CountDistinct(Fields!new_contactidname.Value)) the current expression : =((CountDistinct(IIf(Fields!activitycount.Value<>0,Fields!new_actionitemid.Value, Nothing))/CountDistinct(Fields!new_contactidname.Value)))*100 the wanted expression : textbox21/textbox23 is this possible?

You can write =ReportItems!Textbox21.Value/ReportItems!Textbox23.Value Cheers, Jason P.S. : Please click the 'Mark as Answer' button if a post solves your problem! :)

thank's how can i reach it by click? (it's not part of the exppression options)

I didnt understand what you meant by "reach by click". If you meant how to put the expression, you can just right click on any textbox, go to properties and copy and paste the expression into the value of the textbox.Cheers, Jason P.S. : Please click the 'Mark as Answer' button if a post solves your problem! :)