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finding out the % of 2 variables

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I am working on a pokemon battle script ive pretty much done it all but ive got stuck on a  hp bar.



Has you can see from the screenshot i have a hp bar to show users how much health is left.  I work out what the hp should be by timing there level by 6 so i have a variable called $fullhp which is what the full hp should be then im storing the current hp in a database  and grabbing it with $ current

so $fullhp  could be 60

$current = 10

i am stuck on how to work out the maths the bar uses a %

 <div id="pokemon_life" role="progressbar" style="width: 45%;" aria-valuenow="10" aria-valuemin="0" aria-valuemax="100" class="hp_progress"></div>


I have to edit the bar with the width: 45%



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