Thank you for the opportunity to help you with your question!
probability can not be more than 1 ,1 is the the maximum and zero(0) is the minimum.When
you understand probability to be a fraction, for example, an event with a
100% probability to have a 1/1 probability ( or 2/2, 3/3, etc), that
number is equal to 1 (ex. 2/2 = 1). This is the highest probability.
You cannot have a probability of greater than 100%. You cannot have a
150% chance of anything. 100% is a sure thing. This makes 1 the
maximum possible probablity of an event.
On the flip side of that coin, the lowest probability for an event is a
0% chance. This means no chance at all. You cannot have a probability
less than that, as your ratios are 0/1, 0/2, 0/3, etc. This makes 0 the
lowest possible probability of an event.
Please let me know if you need any clarification. I'm always happy to answer your questions.