Calculations part 2

[Battle_Ring]

Ok im trying to calculate % weight loss

Right now i have
$post['percentlost'] = ceil(intval($post['weightlost']) / intval($post['leftlose']+$post['weightlost']) * 100);

BUT this is not calculating what i need it is calculating % lost of my goal
i need it to calculate my total % of weight loss

HEre are the stats

Starting Weight: 268 lbs This is field 10
Current Weight: 265 lbs This is field 11
Goal Weight: 235 lbs This is field12
Weight Lost: 3 lbs This is weightlost
Left to Lose: 30 lbs This is leftlose
Percent Lost: 10 % this is percentlost


I believe this is the formula used to calculate % lost

Original Weight minus Current Weight

Now divide your answer by your Original Weight then multiply by 100

--------------- Added [DATE]1227733026[/DATE] at [TIME]1227733026[/TIME] ---------------

wouldnt it be

$post['percentlost'] = ceil(intval($post['field10']) - intval($post['field11']) / intval($post['field10']) * 100);

??? but for some reason that gives me 170 %