Normalized is a value between 0 and 1, representing a percentage of how full a stat is. You get it by dividing Current stat by Full stat (or however you wanna call it).
In your case, your Current Freshness is 44, and Full Freshness is, like, 59? So 44 / 59 = 0.75. 75% full.
14 x 0.75 = 10.5.
-3 -10 +4.44 -15.993 + 10.5 = -14.053