73.085 in standard form

Based on what i know about mean, this doesn't add up.

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?

The graph represents the gallons of water in a water tank with respect to the number of hours since it was completely filled