Is 9.78083151 irrational or rational

What is the slope simplify your answer and write it as a proper fraction, improper fraction, or integer

Abby is preparing fruit punch for her party. she starts with a bowl filled with liquid that has 1/2 fruit juice and 1/2 sprite, but she decides it's too fruity. so she pours out 1/4 of the liquid, and then fills the bowl up again with sprite. what fraction of the punch is now sprite?

Which one ? is the answer and how to find this answer