Well, I took my Electrical Journeymans exam back in '95. It was 75 code questions and 5 calc's. The calc's were worth 5 points each. Code questions were 1 point each. Do the calcs first. 25% of the test right there.
Since you say they're changing testing company's, the format may change as well making the info above void. Good luck.
Update: I just reread your question. I thought you were asking about the Electricians test, not the contractors test. Sorry.