And so if we have a number divided by some positive number plus Kcat plus itself, this will basically be a ratio that is less than one. Now, what is the maximum value of this ratio? Well, the maximum number of this ratio is basically reached when this value approaches zero. So when this quantity approaches zero, that basically means we have Kcat divided by Kcat, and that gives us one. So the maximum, the highest possible value of this ratio in parentheses is one. And when this is equal to one, then we see that this ratio is simply equal to k one.