Put the same variable on the same side first than solve
If Kolby is reading 108 books per year, and there are 12 months in a year, this means that he is reading 9 books a month. (108/12=9)
As this is over five months, he will be reading 45 books (9*5)
Hope this helps :)
The number 57 is a rational number. Rational numbers can be written as a fraction. 57/1 is an example. Irrational numbers cannot be written as a fraction. Example of an irrational number would be square root of 5.