Okay perhaps it's been too many years since college, and I was bad in math anyhow. But this whole -0.6 or .06 is confusing to follow which direction it going. So I made this chart which I assume is correct so I can easily see which direction I am heading. I always associate the number on the right of the decimal point to be negative. So hopefully this is correct, and the bold values are the outer limits of the range, the underlined numbers are the range I want to target.

1.1, 1.0, 0.9, 0.8, .07,0.6, 0.5, 0.4, 0.3, 0.2, 0.1,0, -0.1, -0.2, -0.3, -0.4, -0.5,-0.6, -0.7, -0.8, -0.9,-0.10, -0.11

So if I get a value of -0.18, where is that go on the chart? Between -0.1 and -0.2? Or between -0.17 and -0.19?

Perhaps this confusion is from my recent experience sniffing too much muriatic acid, lol.

thanks