BEx Fixed Unit of measure display in a Formula

Hi,

I have got a formula in BEx Query, it has an if else condition to display the value. the first part is when if condition is true,  display the value in a keyfigure else display fixed value 100%.

The displaying keyfigure is created in back end, it is defined with % as Fixed unit of measure. So, the first part of the condition is working fine, the else part I am unable to display the constant value as '100%',  I am wondering how can define fixed unit of measure in BEx formula for a constant value?

Do you know, how can I display it?

Thanks

Sreekanth