# Find ratio for any number of variables in php?

## Question by neha thamman

I want to find ratio for any number of variables in php.

For example: 1:2 10:100:50

30:90:120:150

How can I get such rations?

## Answer by Starx

One way would be convert the values to decimal values and covert them to fraction.

I found a function that will do this: [Source]

```
function decToFraction($float) {
// 1/2, 1/4, 1/8, 1/16, 1/3 ,2/3, 3/4, 3/8, 5/8, 7/8, 3/16, 5/16, 7/16,
// 9/16, 11/16, 13/16, 15/16
$whole = floor ( $float );
$decimal = $float - $whole;
$leastCommonDenom = 48; // 16 * 3;
$denominators = array (2, 3, 4, 8, 16, 24, 48 );
$roundedDecimal = round ( $decimal * $leastCommonDenom ) / $leastCommonDenom;
if ($roundedDecimal == 0)
return $whole;
if ($roundedDecimal == 1)
return $whole + 1;
foreach ( $denominators as $d ) {
if ($roundedDecimal * $d == floor ( $roundedDecimal * $d )) {
$denom = $d;
break;
}
}
return ($whole == 0 ? '' : $whole) . " " . ($roundedDecimal * $denom) . "/" . $denom;
}
```

Now

```
$total = 1 / 2;
echo decToFraction($total);
```

Or, you could use PEAR’s Math_Fraction [Source]

```
include "Math/Fraction.php";
$fr = new Math_Fraction(1,2); //Put your variable like this
// print as a string
// output: 1/2
echo $fr->toString();
// print as float
// output: 0.5
echo $fr->toFloat();
```