since9
Campaign Veteran
I put your original picture in Photoshop, cropped out everything except the bottom right corner, the "comparison" and left it the same size. Then I used the original and merely reduced the overall size of the image, keeping the proportions constrained so the vertical and horizontal were the same percentages. This way, if anybody is interested, they click on the image and read what they want.
Easy peasy.
And doesn't take up so much "real estate".
I see.
I prefer paint.net, myself, as it layers well, allowing one to overlay text on top of a picture with minimal artifacts common among other programs.
But for this graphic, I used MS Publisher, putting down the background, first, before adding the text on the left, the text in the upper right, and finally, inverting colors from Excel before laying the result in the lower right.
What I can't seem to find is the original Excel file I used for the computations. I did this on my old laptop, and not everything made it to my new one...