7.09 is not greater than 7.2 because .09 is on the hundren place while .2 is on the tenth place. If you wanted to know whether 7.09 is greater 7.2, you had to move one time on the right for 7.2 and it will give you 7.20 which is now in a hundren place.
So if you look closely 7.20 will be greater than 7.09