Hi, Paul.

That particular lesson has been a struggle for many parents. In fact, RS has looked into that lesson and has revamped it for future releases. The point of the lesson, though, is to calculate percentage based on 50 states. That being said, if you don't come up with the exact percentage that the answer key has (as happened in my family every time we went through the lesson) that is ok - as long as they are getting the correct percentage from the states they have calculated.

Again, this lesson in the next release will be a little easier to use. Until then, feel free to post here or email me directly. I am happy to help you when I can!