How much is 14 / 15 times by 100 using PHP

I divide 14 / 15 times it by 100 to get the percentage which is 93.33333333333333 how can I display it as 93.3% using php?

Here is the code.

$percent = ($avg / 15) * 100;

Any One could provide me some hints about this PHP Math will be highly appreciated.