JSFiddle - React, Tailwind, and code Playground

JavaScript

var numbers = new Array(192.168,
192.11 ,
192.21 ,
192.26 ,
192.30 );

var response = "";

for(var i =0 ; i< numbers.length ; i++)
    
{
     var rounded = Math.floor(numbers[i]*10)/10  + '0';
     response +=   numbers[i] + " => " + rounded + "\n";
        
}

alert(response);