Because 45 is not a factor of 60.
45 15,3 5,3,3
45 15,3 5,3,3
Use a factor tree. 45 15,3 5,3,3
45 15,3 5,3,3
45 15,3 5,3,3
45 doesn't divide into 60 evenly.
45 15,3 5,3,3
15,3 3,5,3
Because 45 is not a factor of 60.
45 doesn't divide into 60 evenly.
Use a factor tree. 45 15,3 5,3,3