How to Independently Determine the Proportion of Dark Energy Density?

[Ranku]

Is there a way to independently determine the proportion of dark energy density to total energy density of the universe apart from using 1 -(Ω_matter+Ω_{dark matter} )?

 

[Hyperfine]

See: M. Kowalski, et. al.,Improved Cosmological Constraints from New, Old and Combined Supernova Datasets

 

[timmdeeg]

What do you mean by saying a "proportion of dark energy"? It's density is constant and a tenth of it too.

 

[Hyperfine]

What do you mean by saying a "proportion of dark energy"? It's density is constant and a tenth of it too.

From what was stated, I assume Ω_Λ.