CODEWITHSUNDEEP
phpmathpercentage
Kevlar
Kevlar

Reputation: 334

Percentages in PHP

Not to sound stupid but I was wondering if there is a very simple way of taking a percentage from a number in PHP?

Say I have a number of 70.40 and I want to remove 15% of this.

So far I have something like:

$discount = 15;

$price = 70.40;

$newPrice = $price - (($discount / 100) * $price);

But this seems to be giving me all kinds of random numbers.

is there an easier way?

Upvotes: 0

Views: 166

Answers (3)

n1te
n1te

Reputation: 945

Try this:

function apply_discount($price, $discount) {
    $after_discount = $price - (($price / 100) * $discount);
    return $after_discount;
}

e.g.

echo apply_discount(200, 15); //170

Upvotes: 2

Fredrik Westerlund
Fredrik Westerlund

Reputation: 133

70.40 * 0.15 = 10.56

whereas 0.15 is 15%

I guess you could do something like this.

$discount = 0.15;
$price = 70.40;
$newPrice = $price - ($price * $discount);

Upvotes: 0

fehnomenal
fehnomenal

Reputation: 509

$discount = 15;
$price = 70.40;
$newPrice = $price * (100 - $discount) / 100;

If your $discount would be a percentage (between 0 and 1) it would be:

$discount = 0.15;
$price = 70.40;
$newPrice = $price * (1 - $discount);

Upvotes: 2

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