Let's break the hexagon into 6 equal pieces:

whole hexagon and hexagon cut into 6 equal pieces

What if we just had one of the pieces?

one triangle of hexagon that's cut into 6 equal pieces

That would be 1 piece out of 6 pieces. Right?

 

Here's how we write it:

1/6 - the top number is called the numerator and the bottom number is called the denominator

We read this like "one sixth."
 

(Wouldn't The Denominator be a great name for an Arnold Schwarzenegger movie?)