I'm not sure why you think that numbers don't add anything, this example from wikipedia is helpful: https://en.wikipedia.org/wiki/Bi-elliptic_transfer#Example h

I'm not sure why you think that numbers don't add anything, this example from wikipedia is helpful: https://en.wikipedia.org/wiki/Bi-elliptic_transfer#Example https://en.wikipedia.org/wiki/Bi-elliptic_transfer#Example Including illustrative numbers on the diagram in the article would be helpful to show the difference.