Help me solve this problem please num 25

Can some one me, i’ve been asking for so long

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?

Add the two expressions 3.8b - 7 and 2.9b + 9 enter your answer in simplified form