Plotting two Lorenz curves from data sets with different number of positions

Hi everyone!
I am hoping someone will be able to help me to figure out how to adjust the graph with two Lorenz curves. So the problem is that one data set I am using has 11 positions and another has 12. When I am plotting two Lorenz curves they are not adjusted (in case it's hard to understand check the attached picture). I want them to be uniform in regard to the line of the best fit. What should I do?

Best,
Liv
Lorenz.JPG

you wanted smth like that?

Yes! That's exactly what I am looking for! Could you please write what I have to do?

unfortunately i don't know english axcel menu but i'll try
1 insert a dot graph (tab all graphs 8-th from the top a 2-nd from the left)
2 add one more row

I attached the file with my numbers, I still don't know how to do it even following your steps. Can you take a look?
I am sorry that I bother you with things like this :-/qqq2.xlsx

not at all
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Thank you! You cannot even imagine how grateful I am for helping me out, now I understand! Thank you again for your time :-)