Please help with my math

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?

In the sixth grade 13 out of 20 students have a dog if there are 152 sixth grade students how many of them have a dog

Car a and car b were in a race .the driver of car b claimed that his car was twice as fast as car a