Lilly walks 1/8 of a mile in 1/64 of an hour. Compute the unit rate as a complex fraction in miles per hour. whats the answer?

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?