comefrom: <doocs>2278.Percentage of Letter in String_1.py
code: def percentageLetter( s: str, letter: str) -> int:
      return s.count(letter) * 100 // len(s)
masked: def sample_funcname ( var_0 : str , var_2 : str ) -> int :
      return var_0.count ( var_2 ) * 100 // len ( var_0 )
  