From what I remember, hear is an example cuz idk how to really explain... there are 3 yellow cubes, 4 green, and 2 blue cubes all in one bag. You add the total number of cubes (3+4+2=9) let’s say I want to know what is the probability of grabbing a yellow cube. There is a total of 3 yellow cubes in the bag so just put that over 9 in a fraction (3/9) so that would be your fraction probability and if you want a percentage you just divide the numerator (3) by the denominator (9) which would be .33 so there is a 33% chance of grabbing a yellow cube. I’m so sorry if this didn’t help x-x