Define a percentage variable (simple or complex)

Usage

define_percent(
  output,
  numerator = NULL,
  denominator = NULL,
  numerator_variables = NULL,
  numerator_regex = NULL,
  numerator_exclude_regex = NULL,
  numerator_note = NULL,
  numerator_subtract_variables = NULL,
  numerator_subtract_regex = NULL,
  denominator_variables = NULL,
  denominator_regex = NULL,
  denominator_exclude_regex = NULL,
  subtract_variables = NULL,
  subtract_regex = NULL
)