Added a word that was left out :O).

LOAD_ABS = [air mass (g)/intake stroke] / [maximum air mass (g)/intake stroke at WOT@STP at 100% volumetric efficiency] * 100%. Where:

STP = Standard Temperature and Pressure = 25 oC, 29.92 in Hg (101.3 kPa) BARO, WOT = ... Login to read more.