Help determining percent and weight of NaOH in a water solution?

I have a jug of NaOH in solution that is marked 0.1333 N and another marked 0.1562 N. I've been away from chemistry for too long now and I don't remember the math. For all you smart people out there who can help me - my questions are: What would be the % of NaOH that is in each solution? and What would be the grams per gallon? (if you have the calculations so I can figure this out myself, that would be great too!) Thanks!