<link href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/js/bootstrap.min.js"></script>
<script src="//code.jquery.com/jquery-1.11.1.min.js"></script>
<div class="container">
<div class="row">
<form class="form-horizontal">
<fieldset>
<legend>Form Name</legend>
<div class="form-group">
<label class="col-md-3 control-label" for="buttondropdown">Every extra person</label>
<div class="col-md-3">
<div class="input-group">
<div class="input-group-btn">
<button type="button" class="btn btn-default dropdown-toggle" data-toggle="dropdown">
Fixed
<span class="caret"></span>
</button>
<ul class="dropdown-menu pull-left">
<li><a href="#">Fixed</a></li>
<li><a href="#">Discount</a></li>
<li><a href="#">Extra Charge</a></li>
</ul>
</div>
<input type="number" style="width: 100%" class="form-control" placeholder="amount" required="" min="0"/>
<div class="input-group-btn">
<button type="button" class="btn btn-default dropdown-toggle" data-toggle="dropdown">
€
<span class="caret"></span>
</button>
<ul class="dropdown-menu pull-right">
<li><a href="#">%</a></li>
