JSFiddle - React, Tailwind, and code Playground

HTML

<select name="teste" id="teste"></select>

<div class="resultado"></div>

JavaScript

var iniciaEm = 0;
var terminaEm = 20;
var variacao = 0.1;
var s = "";
var str = "";
for (var i = iniciaEm; i <= terminaEm; i = i + variacao) {
    var nr = i.toFixed(1);
    str += nr + "<br />";
    s += "<option value=\"" + nr + "%\">" + nr + "%</option>";
}

$("#teste").append(s);
$(".resultado").append(str);