仅计算增值税的价值

Question

I trying to calculate but can't get this done, if someone can help

I have the total of the order and the vat at 23%

 $vat = 23;

 $total = 6.00;

For add the vat to total I will do

 $total_with_vat = $total * $vat;

that will be 7.40

I now the total is 6.00, but how can I get the 1.40 of the vat

I need this to make some calculations. Looks simple but I'am not getting only to do it.

Thanks

Answer 1

Pretty simple

$vat = $total * $vat / 100.0;
// 1.38

If you'd like to guarantee 2 digits of precision, you can use round

$vat = round($vat, 2);

---

Make it into a reusable function

function calculateVat($amount, $vat=23) {
  return round($amount * $vat / 100.0, 2);
}

$amount = 6.00;
$vat    = calculateVat($amount);
// 1.38

If VAT is a different amount, you can specify it as a second argument

$amount = 6.00;
$vat    = calculateVat($amount, 30);
// 1.8