<p>I’ve always just done a literal conversion (i.e. 35/36 is the same as a 2340/2400). I know that’s probably completely correct, but that’s how I compared my ACT and SAT scores.</p>
<p>I think comparing the percentiles should work fine. I mean, a little under 1.5 million take the ACT and a little over 1.5 million take the SAT (I believe my numbers are right; someone may want to check me to make sure). So, virtually the same number of people take both, so the percentiles should line up pretty well.</p>