When you are dividing a number by greater number then it goes smaller and smaller. So if you want to find the greatest share thenyou should selct the one which is divided by smaller number.
Imagine 3 pizzas of equal sizes cut into 10 slices, 4 slices, and 5 slices. Having 1 slice of the second pizza is greater than having 1 of a pizza cut into 10 or 5 slices because they get smaller the more you cut it.
