Percentages

[incarnate]

Can someone tell me how to get a percentage of any given number?

[laserlight]

A percentage?
Well, you cant get a percentage with only 1 number.

[incarnate]

Get a given percentage of a given number.
ex: 20% of 450

[laserlight]

that's easy:

$percent = 20;
$num = 450;
$percentage = $num * $percent / 100;

actually, why not simply use 0.2 * 450?