Isn't That Interesting

So you know, I asked Husbandguy, and he did the math the same way PSP and I did, which is very similar to the way NAMG and Aimée did it. The Grandpa is the odd one out, but I have to admit that there have been times when I, too, rounded and then adjusted the difference. Usually, though, I round down and then add back what was taken away.

Anyway, I just thought I'd ask. This stuff interests me. How we think and stuff...