Glad you asked...
Floor Area Ratio is calculated by dividing the gross floor area of the buildings by the total area of the lot. Floor Area Ratio is usually expressed in terms of decimal fraction.
Then again, this answer might help you...
Calculating the floor area ratio is necessary in order to determine the quantity of materials construction workers, builders, and contractors need prior to starting a project.Calculating floor area ratio is easy. For more information look here: calculate floor area ratio ;

