plusMInusTwo

The code computes the sum of all the positive numbers, the sum of all the negative numbers, and the number 0 (zeros).

function plusMinus(){
  let positive = arr.filter(number => number > 0).length / arr.length;
  let negative = arr.filter(number => number < 0).length / arr.length;;
  let zeronums = arr.filter(number => number == 0).length / arr.length;;
  return console.log(positive.toFixed(6) + '\n' + negative.toFixed(6) + '\n' + zeronums.toFixed(6))
}