Help for MAL Tampermonkey scripting

// @include      /^https:\/\/myanimelist\.net\/anime\/[\d]+\/.*

// @include      /^https:\/\/myanimelist\.net\/anime\/[\d]+(\/.*)?/

// ==UserScript==
// @name         Days to Hours and stats in %
// @namespace    http://tampermonkey.net/
// @version      0.2
// @description  Adds days and stats in % for both anime and manga
// @author       Me
// @match        https://myanimelist.net/profile/*
// @run-at document-end
// @grant          GM_addStyle
// ==/UserScript==

(function(){
main();

function main() {
    GM_addStyle(".profile .user-statistics .stats-status{width: 200px;}");

    const [animeDays,mangaDays] = document.querySelectorAll(".di-tc.al.pl8.fs12.fw-b");

    showHours(animeDays);
    showHours(mangaDays);

    const {animeTotal,mangaTotal} = getTotals();
    const {animeStats, mangaStats} = getStats();

    showPercentage(animeStats,animeTotal);
    showPercentage(mangaStats,mangaTotal);
}

function showHours(days) {
    const hours = days.cloneNode(true);
    const hoursText = hours.querySelector("span");
    const hoursValueNode = hoursText.nextSibling;
    const hoursValue = parseFloat(hoursValueNode.textContent.replace(/,/g,""));

    hoursText.textContent = "Hours: ";
    hoursValueNode.textContent = (hoursValue * 24).toFixed(1);
    days.insertAdjacentElement("afterend",hours);
}

function getTotals() {
    const [animeTotalElement,,,mangaTotalElement] = document.querySelectorAll(".stats-data.fl-r span:nth-child(2)");
    const totals = [animeTotalElement,mangaTotalElement];
    const [animeTotal,mangaTotal] = totals.map(total => parseInt(total.textContent.replace(/,/g,"")));

    return {
        animeTotal,mangaTotal
    };
}

function getStats() {
    const stats = [...document.querySelectorAll(".di-ib.fl-r.lh10")];
    const animeStats = stats.slice(0,5);
    const mangaStats = stats.slice(5);

    return {
        animeStats, mangaStats
    };
}

function showPercentage(stats,total) {
    const [watching,completed,onHold,dropped,planToWatch] = stats;

    [watching,completed,onHold,dropped,planToWatch].forEach(node => addPercentage(node,total));
}

function addPercentage(node,total) {
    const value = parseInt(node.textContent.replace(/,/g,""));
    let percentage;

    if(total === 0) {
        percentage = "0.00";
    }
    else {
        percentage = (value*100/total).toFixed(2);
    }
    node.textContent = `${node.textContent} (${percentage}%)`;
}
})();