I'm trying to work out the percentage amount saved between price and saleprice and display the result in a div. So far I have the following but it doesn't seem to be working. Can anyone see where I'm going wrong?

```
<script type="text/javascript">
function calc()
{
    var price = 0;
    var saleprice = 0;
    var savingPercent = 0;

    price = Number(document.getElementById("price").value);
    saleprice = Number(document.getElementById("saleprice").value); 

    savingPercent =(((price - saleprice) / price) * 100).toFixed(0);
    document.getElementById('savingPercent').innerHTML = "You have saved" +savingPercent+"% ";  
}
</script>

<div id="price">&pound;100</div>
<div id="saleprice">&pound;20</div>
<div id="savingPercent"></div>

```