Avoid empty cells to appear in Dax

I have a matrix below which is based on the G/L Account and Product when I merge the net revenue with its percentage value using

Base | G/L Weekly Revenue and Its PCT = 
FORMAT( 'Calculations'[Weekly Sales], "Standard" ) & " ( " &  
FORMAT([Revenue | G/L PCT], "0.00%") & " )"

It Creates empty cells

How to avoid this ? many thanks in advance

>Solution :

Use an IF statement.

Base | G/L Weekly Revenue and Its PCT = 
  IF(
    NOT(ISBLANK('Calculations'[Weekly Sales])) && NOT(ISBLANK([Revenue | G/L PCT])) ,
    FORMAT( 'Calculations'[Weekly Sales], "Standard" ) & " ( " &  FORMAT([Revenue | G/L PCT], "0.00%") & " )"
 
  )