magento/magento2 — pull request #477 by centerax (2014-01-21 15:15:15+00:00)
Title: Bad tax calculation function

On this file app/code/Magento/Catalog/view/adminhtml/catalog/product/js.phtml on line 73 I think there is an error when calculating the tax rate, this should read ```php spanValue = ' ' + formatCurrency((input.value/100)*rate, priceFormat);``` instead of ```php spanValue = ' ' + formatCurrency(input.value/(100+rate)*rate, priceFormat);```

The problem is adding rate to 100(%).

This is present on current Magento EE 1.13 and Magento CE.