plusMInusOne

let copy = [...arr],
    bigSide = copy.length,
    neytral = copy.filter((num) => num * num === num && num + num === num),
    negative = copy.filter((num) => num < 0).length,
    positive = copy.filter((num) => num > 0).length;

  return [
    neytral.length > 0 ? (neytral.length * 10) / copy.length / 10 : 0,
    negative > 0 ? (negative * 10) / copy.length / 10 : 0,
    positive > 0 ? (positive * 10) / copy.length / 10 : 0,
  ].map((num) => num.toFixed(6, "") * 1);