Create the variables FMTNAME and TYPE with fixed values. The RETAIN statement is more efficient than an assignment statement in this case. RETAIN retains the value of FMTNAME and TYPE in the program data vector and eliminates the need for the value to be written on every iteration of the DATA step. FMTNAME specifies the name PercentageFormat, which is the format that the input control data set creates. The TYPE variable specifies that the input control data set will create a numeric format.

   retain fmtname 'PercentageFormat' type 'n';