lold

HTML

<div id="summ"></div>

JavaScript

"use strict";

var vote = (5+4+3+2);
var fin_vote = vote * 0.8;
var summ_elem = document.getElementById("summ");

if (fin_vote > vote) {
	summ_elem.innerHTML = "что-то тут не так!";
} else if (fin_vote < vote) {
	summ_elem.innerHTML = "всё норм!";
}