Having trouble with a % calculation

I'm using this math code:

$stake=number_format(($mem_tot_gold/$tot_gold)*100,2);

1,895,462/157,657,698 = .64 (should be 1.2)

449,055/157,657,698 = 285.99 (should be .28)

I'd done a echo on $mem_tot_gold and $tot_gold, which are showing the right numbers. Any idea what I'm doing wrong?

$mem_tot_gold = 449005;
$tot_gold = 157657698;
$stake=number_format(($mem_tot_gold/$tot_gold)*100,2);
echo $stake;

Copy and paste this, there is no reason that it shouldn't work tbh.

Guys - who told you that you to multiply by 100 when working out a percantage? Try (tot_gold/100)*mem_tot_gold

multiplying by 100 IS correct. Try

20/100 - ans .2  then when you multiply by 100 you get 20

another

37/74 - and .5 then x 100 you get 50

Muddy_Funster did you fail math? haha

The values of the variables clearly are not what you think they are when the calculation occurs.  Everything else is fine.

$mem_tot_gold = 1895462;
echo "mem_tot_gold: $mem_tot_gold\n";
$tot_gold = 157657698;
echo "tot_gold: $tot_gold\n";
$stake = number_format(($mem_tot_gold/$tot_gold)*100,2);
echo "$stake\n";

PHP 5.3.1 (cli) (built: Nov 20 2009 18:18:28) 
Copyright (c) 1997-2009 The PHP Group
Zend Engine v2.3.0, Copyright (c) 1998-2009 Zend Technologies
[david@benji ~]$ php -f pmath.php
mem_tot_gold: 1895462
tot_gold: 157657698
1.20

try

$stake=number_format((str_replace(',', '', $mem_tot_gold)/str_replace(',', '', $tot_gold))*100,2);