To make it easier to understand, we chose to display a percentage value for each item's float value.
For example, given 50% is average, a value of 60% means the skin looks "above average" and 30% means "below average".
As you can see, Factory New will always look close to Factory new because possible range is so small (0.00 - 0.07).
However, Field-Tested has a greater range (0.15 - 0.37) and can have Minimal Wear look (close to 0.15), or Well-Worn look (close to 0.37).