formula for discount

Question

What is the formula for discount,

in php is there any default function ,

this is my formula, chk it is correct way ,

  $SELLING_PRICE = $ACTUAL_PRICE-$CHK_DISCOUNT_THERE;
  $PRICE_AFTER_DISCOUNT = $ACTUAL_PRICE-$SELLING_PRICE;

Solution 1

selling price = actual price - (actual price * (discount / 100))

So for example if (actual price) = $15, (discount) = 5%

selling price = 15 - (15 * (5 / 100)) = $14.25

Solution 2

Like Literally you can copy paste this formula:

$total = $total - ($total * ($discount_amount/100));

Comments

[Bharanikumar]

i think formula should be $PRICE_AFTER_DISCOUNT = $ACTUAL_PRICE - ($ACTUAL_PRICE * ($CHK_DISCOUNT_THERE / 100));

[Kyle Hudson]

selling price = 15 - (15 * (5 / 100)) = $14.25