I’m not very good at math can some one ?

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?

What could explain what happened when the time was equal to 120 minutes

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much