I'm being told the following formula contains too few arguments, where is it going wrong? =SUMPRODUCT(('Data '!F:F="Lloyd's Patriotic Fund")/(COUNTIFS('Data '!C:C, 'Data '!C:C, 'Data '!F:F="Lloyd's Patriotic Fund")+('Data '!F:F<>"Lloyd's Patriotic Fund")))
Solved by T. W. in 21 mins