Check out this tutorial here.
This shows you want you need to do to get these into %.
A lot depends on the context of the calculation, but you’re 90% of the way there.
https://blog.enterprisedna.co/2017/10/31/advanced-segmentation-example-using-dax-in-power-bi/
The % bit to this tutorial is at the end.
I also recently answered a similar forum post around this as well.
See below.
Thanks
Sam