Subtract a percentage of a number?

listenmirndt

How would I do this :

10 (minus) 30%

Thanks!

suntra

I'm not going to give you the answer...

Hint : the simpliest way is to use a multiplication...

listenmirndt

Yep, this much I know.

Weedpacket

It's not like you don't get taught this in primary school...

listenmirndt

Forget it.

Thanks?

suntra

You probably know it, but look what '%' means in PHP :

http://ca.php.net/manual/en/language.operators.arithmetic.php

bradgrafelman

Are you asking how to do this in PHP? Or the actual computation involved?

It's simple either way: x - .30x

With a few more characters, the equation becomes PHP code...

Horizon88

If it's so simple, why not just post the damn thing instead of belittling him? :/

$number = '10';
$percentage = '.3';
$product = $number - ($number * $percentage);
echo $product;

suntra

Simply cause a good programmer must think and find solutions by himself, and in this case, anyone can do it. If we give answers to all, there won't be any more good programmers 😉

By the way, don't use quotes with integers...

foyer

nah that just means us good programmers get paid more

NogDog

One less arithmetic calculation:

$product = $number * .7;

suntra

Or...

$number = 10;
$percentage = 0.3;
$product = $number * (1 - $percentage);
echo $product;