I'm not sure in which of the following two paragraphs you are interested. Pick the one that applies.

If the site takes a percentage (say 12%) of the total:
$freelancers_fee = $total * (1 - $site_cut)
which is equivalen to
$total = $freelancers_fee / (1 - $site_cut)
Example: Site charges $150, leaving $132 for the freelancer.
Example: Freelancer wants $100, meaning the price has to be $113.64

If the site takes a percentage (say 12%) of the freelancers's fee:
$total = $freelancers_fee * (1 + $site_cut)
which is equivalen to
$artist_fee = $total / (1 + $site_cut)
Example: Freelancer charges $100, bringing the total to $112
Example: Freelancer wants the site to charge $150, leaving $133.93 for the freelancer.

In reply to Re: solving for x by ikegami
in thread solving for x by Anonymous Monk

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.