If a number that can be expressed in the form of p/q is called rational numbers. Here p and q are integers, and q is not equal to 0. A rational number should have a numerator (p) and denominator (q). Examples: 10/2, 30/3, 100/5.
You could find this by going and doing: <span>9: 9,18,27,36,45,54,63,72... 12:12,24,36,48,60,72... </span>36 is the first # that pops up so you could do 36 as a common denominator