Common/Calculator/Margin.php
public function getPercent(): float
    {
        $amount = $this->getAmount();

        if (0 < $this->sellingPrice) {
            return round($amount * 100 / $this->sellingPrice, 2);
        }

        return 0;
    }
public function getPercent(): float
    {
        $amount = $this->getAmount();

        if (0 < $this->sellingPrice) {
            return round($amount * 100 / $this->sellingPrice, 2);
        }

        return 0;
    }
Returns the percentage.

@return float