Javascript - input 숫자필드 자동계산하기

<div class="floor">
    <div class="panel">
        <div class="panel-heading" id="label">
            <h4> <i class="ion-ios-information"></i> {{xe_trans($config->get('label'))}} 정보 입력</h4>
        </div>
        <div class="panel-body">
            <div class="row">
                <div class="col-md-6">
                    <label>현재 층 입력</label>
                    <div class="input-group">
                        <input type="text" class="mmoa_currentFloor form-control filter-input" name="{{$config->get('id')}}_currentFloor" id="currentFloor" onkeyup="percentCal()" placeholder="현재층을 입력하세요" />
                        <div class="input-group-append d-none">
                            <span class="input-group-text" id="basic-addon2">층</span>
                        </div>
                    </div>
                </div>
                <div class="col-md-6">
                    <label>전체 층 입력</label>
                    <div class="input-group">
                        <input type="text" class="mmoa_totalFloor form-control filter-input" name="{{$config->get('id')}}_totalFloor" id="totalFloor" onkeyup="percentCal()" placeholder="전체층을 입력하세요." />
                        <div class="input-group-append d-none">
                            <span class="input-group-text" id="basic-addon2">층</span>
                        </div>
                    </div>
                </div>
                <div class="col-md-12">
                    <label>고층/중층/저층</label>
                    <div class="input-group">
                        <input type="text" class="mmoa_percentFloor form-control filter-input" name="{{$config->get('id')}}_percent" id="percent" readonly/>
                    </div>
                </div>
            </div>
        </div>
    </div>
</div>

//현재층 , 전체층 알고리즘
function percentCal()
{
  var currentFloor = document.getElementById("currentFloor").value;
  var totalFloor = document.getElementById("totalFloor").value;
  document.getElementById('percent').value = (parseInt(currentFloor) / parseInt(totalFloor)).toFixed(2);
  var percent = document.getElementById('percent').value;
  console.log(percent);
}