Margin rate and Mark rate show wrong formula

Hi,

So far as I remember, the Profit Margin (in this case is Margin rate) formula supposed to be:

(Selling Price - Buying Price) / Selling Price

and Markup rate is using different formula: (Selling Price - Buying Price) / Buying Price)


From the picture above it’s look like the percentage number are swapped.

I already changed code in some files in margin module but somehow it’s still not worked.

Finally, I change some text in htdocs/margin/admin/margin.php and htdocs/langs/en_US/margins.lang to fit my needs.

Thanks

Hello,
Please share your findings

hello, i disagree with your formulas; they are the opposite

This is my reference for Profit Margin and Markup formula:

Profit Margin = (Revenue - Cost) / Revenue
Markup = (Revenue - Cost) / Cost

https://personalmba.com/profit-margin/