Place - 7/8 on the visual representation below.

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?

Determine which expressions represent real numbers and which expressions represent complex number. asaaap! plis!

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?