This is relative frequency table. Can someone help me?

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?

Write the fraction 9/50 as a decimal if needed round to the nearest hundredth

Find an equation of the line perpendicular to the graph of 28x-7y=9 that passes through the point at (4,1)