To determine the amount of kilocalories supplied by 20% lipid, the volume of 20% lipid (in ml) is multiplied by 2.0.
(If it were to be 10% lipid, the amount of kilocalories supplied will be calculated by multiplying the volume of 10% lipid (in ml) by 1.1)
Therefore, 275 ml of 20% lipids will supply 275 x 2.0 kilocalories
Answer: 550 kilocalories
or 550000 calories (1 kilocalorie = 1000 calories)