What is the ratio of 18: 38 simplified? ?

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?

For which pair of functions is (gof)(a)=|a|-2?

This is so hard and it’s for a test