Simplifying fraction

[tebrino]

Anyone has any idea how to it? I'm trying to do this in order to calculate aspect ratio of images. For example, how to detect that image of 2048x1152 resolution has 16:9 aspect ratio? I'm sure is something simple, but I'm completely lost

[NomikOS]

seems like "Rule of Three"

look at:

[en.wikipedia.org...]

[NomikOS]

2048 -> 16
1152 -> x

x = 2048/(16*1152)

?

[rainborick]

I think you need to look for scripts than can calculate 'least common multiple' and adapt them to your needs.

[tebrino]

Thanks for your replies. What I needed to do is find greatest common divisor:

<?php
function GCD($a, $b) {
while ($b != 0) {
$remainder = $a % $b;
$a = $b;
$b = $remainder;
}
return abs ($a);
}
?>

And then simply divide both sides with it:

<?php
$a = 2048;
$b = 1152;
$gcd = GCD($a, $b);
$a = $a/$gcd;
$b = $b/$gcd;
$ratio = $a . ":" . $b;
?>

Not very elegant at this moment, but it works :-)