JSFiddle - React, Tailwind, and code Playground

HTML

<div class="inside"> 
    <input type="hidden" name="save_input" value="true" />
    <div class="options" data-layout="default" data-show="true" style="display:none"></div>
    <div id="acf-job_bounty_amount" class="field field-number required">
        <p class="label"><label for="fields[field_50216b02ae772]">Job Bounty Amount <span class="required">*</span></label></p>
        <input type="number" step="any" value="2300" id="fields[field_50216b02ae772]" class="number" name="fields[field_50216b02ae772]" />
    </div>
    <div id="acf-job_bounties_commission" class="field field-calculation_field">
        <p class="label"><label for="fields[field_5054963ac994c]">Job Bounties Commission</label></p>                
        <script>                        
            jQuery('#acf-job_bounty_amount input').change(function() {                            
                var value = jQuery(this).val();                                                           
                jQuery('#fields[field_5054963ac994c]').val((value / 100) * 30);                                                                        
            });                 
        </script>                     
        <input type="text" readonly="readonly" value="690" id="fields[field_5054963ac994c]" class="calculation_field" name="fields[field_5054963ac994c]" data-field="job_bounty_amount" data-op="percent" data-calc="30" />
    </div>
    <div id="acf-job_bounties_total" class="field field-calculation_field">
        <p class="label"><label for="fields[field_50560ba57e8dd]">Job Bounties Total</label></p>                
                
        <input type="text" readonly="readonly" value="2990" id="fields[field_50560ba57e8dd]" class="calculation_field" name="fields[field_50560ba57e8dd]" data-field="job_bounty_amount" data-op="percent" data-calc="130" />
    </div>
</div>

JavaScript

jQuery('#acf-job_bounty_amount input').bind('keyup mouseup', function () {   
    var value = jQuery(this).val();
    jQuery('#fields\\[field_5054963ac994c\\]').val((value / 100) * 130);                                                                        
});