function plusMinus(arr) {
    // Write your code here
    //Variables
    let arrSize = arr.length;
    let ratioPositive = 0;
    let ratioNegative = 0; 
    let ratioZero = 0;
    
    //Array Function
    arr.forEach(value =>{
        if(value > 0)
            ratioPositive++;
        else if(value < 0)
            ratioNegative++;
        else if(value === 0)
            ratioZero++;
     }
    );
    
    ratioPositive /= arrSize;
    ratioNegative /= arrSize;
    ratioZero /= arrSize;
    
    console.log(ratioPositive.toFixed(6));
    console.log(ratioNegative.toFixed(6));
    console.log(ratioZero.toFixed(6));

}