ok, what am I doing wrong? I need to calculate (divide) 2 numbers and then multiply by 100 to get the average. Kix can add, subtract and multiple but can't divide?

$foo = 5
$bar = 10

$foo + $bar
- returns 15

$foo - $bar
- returns -5

$foo * $bar
- returns 50

... but ... $foo / $bar
- returns ... zero?