Wie ändere ich `9 / 12` in die einfachste Form?

To express a fraction in `color(blue)"simplest form"` we need to find a number, the largest is preferable, that divides into both 9 and 12.
In this case the largest number that divides into both is 3.

Now we divide 9 and 12 by 3

`rArr9/12=(9÷3)/(12÷3)=3/4" in simplest form"`

Usually, the task of dividing both numbers by 3 is performed mentally, stroking out the number and replacing it by the value remaining after division.This is called `color(red)"cancelling"`

`rArr(cancel(9)^3)/(cancel(12)^4)=3/4`