How+do+you+determine+probability?

One easy and simple way is just to divide. Your answer will probably end up as a decimal, and then you convert that decimal to a percent to find probability. Here's an example-There are 50 marbles in the bag, and you want to find the probability of picking at random a blue marble. There are 32 blue marbles in the bag. You would divide 32 by 50, because you divide the total ways a specific outcome will happen divided by the total number of outcomes. 32/50=0.64, so your probability would be 64%.

-Jake