How to convert number to percentage using Dynamic value format name

[hafu4249]

Now, I have a selector and measure as below
However, it shows the number not in percentage.

I found some people discuss using HTML parameter can change the apperarance 
here: Dynamic value format name

but I didn`t get how to show them in percentage style using Dynamic value format. 

  parameter: measure_selector {
    label: "parameter(y)"
    type: unquoted
    allowed_value: {
      label: "total amount of conversions"
      value: "new_total_conversions"
    }
    allowed_value: {
      label: "total amount of clicks"
      value: "total_clicks"
    }
  }

  measure: selected_measure {
    type: number
    label: "selector(y)"
    description: 
    sql:
      {% if measure_selector._parameter_value == "new_total_conversions" %}
      ${new_total_conversions}
      {% elsif measure_selector._parameter_value == "total_clicks" %}
      ${total_clicks}
  }

Now it shouws like this:

0.03

And this is what I want:

3%

[sam8]

Something like this should work (replace ( ) with { }): 

 html: 
  (% if count_format._parameter_value == "'percent'" %)
  (( value | times: 100 | round: 2 ))%
  (% else %)
  (( value ))
  (% endif %)
;;