How many stitches do I pick up?

Posted by: Cathy (IP Logged)
Date: May 04, 2009 02:59PM

If a pattern states to pick up 1 st for each st and 2 stitches for every 3 rows, what mathmatical formula do I use to figure out how many stitches I should end up with. I'm trying to pick up stitches around an armhole which is 66 rows for the front and 66 rows for the back plus 18 sts for the under arm. I just can't figure it out, please help!