function plusMinus(arr) {
  let min = []
  let plus = []
  let zero = []
  
  arr.forEach((val) => {
      if(val < 0) {
        min.push(val)
      }
    
     if(val > 0) {
        plus.push(val)
     }
    
     if(val == 0) {
        zero.push(val)
     }
  })
  
  plus = Math.abs(plus.length / arr.length).toFixed(6)
  min = Math.abs(min.length / arr.length).toFixed(6)
  zero = Math.abs(zero.length / arr.length).toFixed(6)
  
  console.log(plus)
  console.log(min)
  console.log(zero)
}