use of map method in javascript

let clothPrices = [350, 200, 500, 800]
let discountPercent = 10 //percent 

let discountedClothPrices =  clothPrices.map((price)=>{
    let amount = (price * discountPercent)/100;
    return (price - amount).toFixed(2);
})  

console.log(discountedClothPrices)