I don't exactly understand why you'd want to display zeros with no % symbol, but you can do it by creating a calculated field and formatting the number as a string.
IF ROUND(AVG([Discount])*100,0)=0 THEN
STR(ROUND(AVG([Discount])*100,0)) + "%"
See attached workbook.
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removing percentage.twbx 1.2 MB
Thank you Deepak and Ken .
one more quick help .
When i remove "0" it becomes blank and it becomes a dimension .
is there a way to convert it to measure with those null values without making null values to 0