Decreasing Evenly Across a Row

I have created a formula to help you figure out exactly what you are supposed to knit, when a pattern asks you to decrease evenly across a row. Check it out (in PDF format to retain formula construction). I hope it helps you the next time you come across ambiguous pattern instructions.

I will likely put a few more of these up in the near future, as I realized how little mathematical knitting instruction there is out there while researching for this topic.