Showing label if greater than percentage using Arcade with ArcGIS Pro

Question

I have a text field called PerVax1 that has percentages.

I want to create an expression that labels the features when the field has a percentage greater than 30%. Here's some things I've tried so far:

var percentage = $feature.PerVax1;
var prcnt = "30%";
IIf(percentage >= "30%"){
return percentage}

//resulted in error:
Invalid expression.
Error on line 4.
Semicolon or new line expected.

var precentage;
percentage = IIf($feature.PerVax1 >= "30%")
return percentage;

//resulted in error:
Invalid expression.
Error on line 2.
Wrong number of arguments

Answer 1

I basically had it already.

var pct = $feature.PerVax1;
IIf(pct > "30%", $feature.PerVax1, "");

I forgot to mention I'm working in the label expression window.