RY RY's challenge!

what am I fractions

100

I am one half of a whole fraction. What am I?

I am 1/2

200

I am 3/4 of a whole fraction. what am I? 

I am 1/4.

300

I am 1/2. Simplify what I am. What am I?

How do you simplify 1/2?

400

I am 5/15. Simplify what am I. What am I?

I am 1/3