how to get value form Ajax to php - php

Question

I have a question: How to get value form Ajax and sent value to PHP ? Can someone help me! Value percentold ajax sent to $percent for option value.
<div class="form-group p-1 m-0">
<h6>Percent </h6>
<select class="form-control form-control-lg p-2" name="percent" id="percent" >
<?php
$percent = 'val(data.percent)'; // <<<--- HERE HOW TO GET Value FORM Ajax and sent here
echo '<option class="text-white">'.$percent.'</option>';
for ($i=100; $i>=1; $i--) {
?>
<option value="<?php echo $i;?>"><?php echo $i;?>%</option>
<?php
}
?>
</select>
</div>
//////////////////////////////AJAX///////////////////////////
$("body").on("click",".editBtn", function(e){
e.preventDefault();
edit_skill = $(this).attr('id');
//console.log(edit_skill);
$.ajax({
url: 'assets/php/process.php',
method: 'post',
data: {edit_skill: edit_skill},
success:function(response){
//console.log(response);
data = JSON.parse(response);
//console.log(data);
$("#id").val(data.id);
$("#title").val(data.skill);
$("#percentold").val(data.percent);
$("#sequenceold").val(data.sequence);
$("#percentold").val(data.percent); <------Neet post go to php
}
});
});

Answer 1

what is val(data.percent). As is, its just string.
if you want to add it as option from javascript to select then you need to use
<script>
$('#percent').append(new Option(data.percent, ""));
</script>
in your case :
$('#percent').append(new Option(data.percent, ""));