yüzde alırken sorun yaşıyorum yardımcı olurmusunuz ?

arkadaşlar iyi akşamlar eloboost için script yazmaya çalışıyorum çok fazla bilgim yok o yüzden kusura bakmayın yapamadığım şey " eloboost-lp-old" id sine % olarak value de eklediğim rakamların hesaplanmasını istiyorum ama beceremedim bir de ülkeden ülkeye fiyatların değişmesini istiyorum nasıl yaparım yardımcı olurmusunuz ?

<link rel="stylesheet" type="text/css" href="css/2048.css">
<div class="rutbeler" style="width: 1000px; height: 500px; margin: auto;">
<div class="simdikiRutbe" style="float: left;">
<h2>CURRENT RANK</h2>
<table class="table-orta" >
<tbody>
<tr>
<td><select id="simdikiRutbe"  name="simdikiRutbe" onchange="hesapla(),gettier_old()">
<option selected="selected" value="1">Iron</option>
<option value="1">Bronze</option>
<option value="1">Silver</option>
<option value="2">Gold</option>
<option value="2">Platinum</option>
<option value="3">Diamond</option>
<option value="4">Ascendant</option>
<option value="4">Immortal</option>
<option value="6">Radiant</option>
</select></td>
<td><select id="eloboost-division-old" class="currentDivision" name="eloboost-division-old" onchange="gettier_old(), limit2(), hesapla()">
<option value="4">Division III</option>
<option value="2">Division II</option>
<option value="3">Division I</option>
</select></td>
<td><select id="eloboost-lp-old" class="yuzde" name="eloboost-lp-old" onchange="gettier_old(), hesapla(); ">
<option value="-2">80-100 RR</option>
<option value="-4">60-79 RR</option>
<option value="2">40-59 RR</option>
<option value="3">20-39 RR</option>
<option selected="selected" value="4">0-19 RR</option>
</select></td>
</tr>
</tbody>
</table>
<img id="tier-img-old" style="display: block; margin: auto;" src="/wp-content/uploads/2023/05/demir3-2.png" alt="League" width="110" height="110" />



</div>
<div class="istenilenRutbe"   class="table-orta" style="position: relative; left: 25px; float: left; align-items: center;" >
<h2>DESIRED RANK</h2>
<select onchange="hesapla()" id="istenilenRutbe" name="istenilenRutbe">
<option selected="selected" value="1">Iron</option>
<option value="1">Bronze</option>
<option value="2">Silver</option>
<option value="3">Gold</option>
<option value="4">Platinum</option>
<option value="5">Diamond</option>
<option value="6">Ascendant</option>
<option value="7">Immortal</option>
<option value="10">Radiant</option>
</select><select   id="eloboost-division-new" name="eloboost-division-new" onchange="hesapla(),checktier(),gettier_new()">
<option selected="selected" value="4">Division III</option>
<option value="6">Division II</option>
<option value="9">Division I</option>
</select><img id="tier-img-new" style="display: block; margin: auto;" src="/wp-content/uploads/2023/05/demir3-2.png" alt="Rank" width="110" height="110"  />
</div>
<div class="server" style="position: relative; right: -290px; float: left; align-items: center;">
<h2>Your Server</h2>
<table class="table-orta">
<tbody>
<tr>
<td><select id="YourServer" name="YourServer" onchange=" checktier(), hesapla(),gettier_old();">
<option selected="selected" value="1">Europe</option>
<option value="2">North America</option>
<option value="3">Ocenia</option>
<option value="4">japan</option>
<option value="5">Korea</option>
<option value="6">Southeast Asia</option>
</select></td>
</tr>
</tbody>
</table>
</div>
<div class="kiminleoynasın" style="position: relative; right: 286x; float: right; align-items: center;">
<h2>Service TYPE</h2>
<table class="table-orta">
<tbody>
<tr>
<td><select id="kiminleoynasın" name="kiminleoynasın" onchange=" hesapla(),checktier(); ">
<option selected="selected" value="1">Solo</option>
<option value="2">Duo</option>
</select></td>
</tr>
</tbody>
</table>
</div>
</div>
<div style="align-items: center; width: 250px; margin: auto;"><button style="align-items: center;">Calculate</button>
<h2 id="fiyat" style="margin: auto;">PRICE: 0$</h2>
</div>
<script src="/js/eloboost.js"></script>

<script>
    var ranks=[1,2,6,9,18,36,72,144,288,2,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1]; //fiyatlar
    var hesapla;
    
    jQuery(document).ready(function(){
        hesapla=function  (){
            var istenilenRutbe=jQuery('#istenilenRutbe').val();
          
            toplam=0;
            for(var i=jQuery('#simdikiRutbe').val();i<=istenilenRutbe;i++){
                if(i<istenilenRutbe){ toplam=toplam+ ranks[i]+2;
                 }else{
                     toplam=toplam+ ranks[i]+ jQuery('#eloboost-division-new').val(); } }
                if(jQuery('#kiminleoynasın').val()>1) {
                toplam= toplam * 2
            }
            jQuery('#fiyat').html( toplam );
            toplam=toplam +( ( toplam / 100 )* jQuery(".yuzde").val());
        };
    });
    
    
    
</script>