"Ask for me tomorrow and you shall find me a grave man" - Mercutio
0.4 and 40% percent are the same thing but if you want a specific one I'd go for 40%
Carbohydrates contain sugar. they are polysaccarides and hydrolyse into disaccharides
they are therefore glucose. glucose is one of the essential reactants for respiration. respiration provides us with energy.This is why energy drinks give us a quick boost of energy.
wheras fat is usally stored and only starts burning when there isnt eough glucose available.
i hope this helps!!!