The answer to that question is 23, to be exact. Of those 23 countries that divide up the continent, Canada, and the United States comprise nearly 80% of the total land area.
I really hope this reply serves as a complete answer and is exactly what you were looking for. ~Brooke❤️
The distance between scale markings on the horizontal scale is 100 km. Comparison of the vertical and horizontal scales indicates that the horizontal scale distance between tic marks is __<u>100</u>_ times that of the vertical scale.