How to get percentage?

Here you go my friend. Please accept this as correct if this meets your requirements

Edit:

Slightly modified the TotalifYes variable :smileywink:

CountofYesHeard = CALCULATE(COUNTA('Table'[Heardofus?]), 'Table'[Heardofus?] = "Yes") 

TotalCounts = 
VAR choice = SELECTEDVALUE('Table'[Heardofus?])
VAR TotalifYes = [CountofYesHeard],
VAR Total = 
CALCULATE
(
    COUNTA('Table'[Heardofus?]),
    all('Table'[Heardofus?])
)
RETURN
SWITCH
(
    choice,
    "No",BLANK(),
    "Yes", TotalifYes,
    Total
)

% heard = DIVIDE([CountofYesHeard],[TotalCounts], BLANK())

Anonymous 

Hi, try with this:

CountYes = CALCULATE(COUNTA(Table1[A]),FILTER(Table1,Table1[B]="yes"))

%Yes of Total = DIVIDE([CountYes],CALCULATE(COUNTA(Table1[A]),ALLSELECTED(Table1)))

Regards

Victor

Lima - Peru