What happens to the fraction as the demominator increases?

Answer 1

A fraction's denominator is the bottom number. As a denominator gets bigger, the fraction gets smaller.

Example: You're splitting a hamburger with a friend, so you each get half: 1/2

Then another guy sits down and wants some fries, so you each get a third: 1/3

Finally your girlfriend joins you and you all share your piece of pie, so you each a fourth: 1/4

In this case, the denominator is the number of people eating, and the more people eating, the less food you get to eat (the fraction).