A software book is divided into two sections, basic operations and advanced in a ratio of 7:2. If there are 450 pages, how many pages is the basic section?
By dividing 450 by 9 which is 7 + 2, both of the ratio numbers, and you get 50. Then you do 50 x 7, the first number, then 50 x 2, the second number, to get 350:100
