[eglaud]

In a Chem Lab we found how much of this light was absorbed by a green/blue solution. It absorbed the most of the light when this light's wavelength was at 700 nm, which was a red/orange light, the complementary color of the solution. What does this tell me about what wavelengths were actually absorbed?

[mikasaur]

What exactly do you want to know? You've already said that it absorbs light at 700 nm... Are you looking to figure out the why?

A site like this might start to help: https://www.wou.edu/las/physci/ch462/tmcolors.htm

[eglaud]

I want to know why the complimentary colored light gets absorbed the most. So why this green liquid absorbed the red light the most out of the rest of the colors

[Corribus]

A white light source has (idealized) light of all wavelengths - colors, if you will. If you pass it through a solution that absorbs all the red light, what is left when it reaches your eyes?

[eglaud]

I'm guessing it's every color besides the red, so it would be the green?

[mikasaur]

I'm guessing it's every color besides the red, so it would be the green?

Pretty much. That site I linked to previously explains this. This image even happens to show for the colors you're talking about:

https://www.wou.edu/las/physci/ch462/chlphyl.gif