percentage calculation in php

[lindajames]

hello.. i have the following calculation code that adds the $total and the $tax variables..

number_format($total+$tax,2,'.','')

can someone tell me how i can calculate the total and then subtract 15% of the final value..

thank you.

[willybfriendly]

$t = round($t-($t * .15), 2);

Or, use ceil() or floor()

WBF