My original variable contents was = (C2/C1*100) Using your logic my result was '=(C2/C1*100)'
where as I was requiring the value 97.5564
I have now found that you can use the 'EVALUATE' function EG
Evaluate ($(vSR283)) AS Result
Where the variable is loaded via a spreadsheet and contains the above code. (C2/C1*100)